diff --git a/runtime/lib/mirrors_impl.dart b/runtime/lib/mirrors_impl.dart
index d8c78e12bdb..6de72055ccc 100644
--- a/runtime/lib/mirrors_impl.dart
+++ b/runtime/lib/mirrors_impl.dart
@@ -56,7 +56,7 @@ class _LocalMirrorSystemImpl implements MirrorSystem {
     if (_dynamicType == null) {
       _dynamicType =
           new _LocalClassMirrorImpl(
-              null, 'Dynamic', false, null, null, [], null,
+              null, 'dynamic', false, null, null, [], null,
               const {}, const {}, const {});
     }
     return _dynamicType;
@@ -340,8 +340,7 @@ class _LazyTypeMirror {
 
   TypeMirror resolve(MirrorSystem mirrors) {
     if (libraryName == null) {
-      // TODO(turnidge): Remove support for 'Dynamic'.
-      if ((typeName == 'dynamic') || (typeName == 'Dynamic')) {
+      if (typeName == 'dynamic') {
         return mirrors.dynamicType;
       } else if (typeName == 'void') {
         return mirrors.voidType;
@@ -385,7 +384,7 @@ class _LocalClassMirrorImpl extends _LocalObjectMirrorImpl
       }
     } else {
       // The owner of a ClassMirror is null in certain odd cases, like
-      // 'void', 'Dynamic' and function type mirrors.
+      // 'void', 'dynamic' and function type mirrors.
       _qualifiedName = simpleName;
     }
     return _qualifiedName;
diff --git a/runtime/tests/vm/dart/isolate_mirror_local_test.dart b/runtime/tests/vm/dart/isolate_mirror_local_test.dart
index 94eaa3fa8a2..5d2e6874d52 100644
--- a/runtime/tests/vm/dart/isolate_mirror_local_test.dart
+++ b/runtime/tests/vm/dart/isolate_mirror_local_test.dart
@@ -270,7 +270,7 @@ void testRootLibraryMirror(LibraryMirror lib_mirror) {
 
   variable = cls_mirror.members['value'];
   Expect.isTrue(variable is VariableMirror);
-  Expect.equals('value type(Dynamic) final', buildVariableString(variable));
+  Expect.equals('value type(dynamic) final', buildVariableString(variable));
 
   // Test type variable mirrors.
   var type_var = generic_cls_mirror.members['method'].returnType;
@@ -331,7 +331,7 @@ void testMirrorSystem(MirrorSystem mirrors) {
   testRootLibraryMirror(mirrors.isolate.rootLibrary);
   testLibrariesMap(mirrors.libraries);
   Expect.equals('void', mirrors.voidType.simpleName);
-  Expect.equals('Dynamic', mirrors.dynamicType.simpleName);
+  Expect.equals('dynamic', mirrors.dynamicType.simpleName);
   testDone('testMirrorSystem');
 }
 
diff --git a/sdk/lib/_internal/compiler/implementation/lib/isolate_helper.dart b/sdk/lib/_internal/compiler/implementation/lib/isolate_helper.dart
index 539e7b49baf..f33154dc95d 100644
--- a/sdk/lib/_internal/compiler/implementation/lib/isolate_helper.dart
+++ b/sdk/lib/_internal/compiler/implementation/lib/isolate_helper.dart
@@ -1224,7 +1224,7 @@ class _Deserializer {
 
   deserialize(x) {
     if (isPrimitive(x)) return x;
-    // TODO(floitsch): this should be new HashMap<int, var|Dynamic>()
+    // TODO(floitsch): this should be new HashMap<int, dynamic>()
     _deserialized = new HashMap();
     return _deserializeHelper(x);
   }
diff --git a/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart b/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart
index f9a3af7c6ad..1db4e07bc91 100644
--- a/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart
+++ b/sdk/lib/_internal/compiler/implementation/lib/js_helper.dart
@@ -934,7 +934,7 @@ jsPropertyAccess(var jsObject, String property) {
 getFallThroughError() => const FallThroughErrorImplementation();
 
 /**
- * Represents the type Dynamic. The compiler treats this specially.
+ * Represents the type dynamic. The compiler treats this specially.
  */
 abstract class Dynamic_ {
 }
diff --git a/sdk/lib/_internal/compiler/implementation/resolution/members.dart b/sdk/lib/_internal/compiler/implementation/resolution/members.dart
index 5985ca83ee7..f9409837c98 100644
--- a/sdk/lib/_internal/compiler/implementation/resolution/members.dart
+++ b/sdk/lib/_internal/compiler/implementation/resolution/members.dart
@@ -1409,10 +1409,6 @@ class TypeResolver {
       String stringValue = typeName.source.stringValue;
       if (identical(stringValue, 'void')) {
         return compiler.types.voidType.element;
-      } else if (identical(stringValue, 'Dynamic')) {
-        // TODO(aprelev@gmail.com): Remove deprecated Dynamic keyword support.
-        compiler.onDeprecatedFeature(typeName, 'Dynamic');
-        return compiler.dynamicClass;
       } else if (identical(stringValue, 'dynamic')) {
         return compiler.dynamicClass;
       } else {
diff --git a/sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart b/sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart
index 5f7c700f12c..f232595bacc 100644
--- a/sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart
+++ b/sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart
@@ -430,7 +430,7 @@ class SimpleTypesInferrer extends TypesInferrer {
   }
 
   /**
-   * Returns the return type of [element]. Returns [:Dynamic:] if
+   * Returns the return type of [element]. Returns [:dynamic:] if
    * [element] has not been analyzed yet.
    */
   TypeMask returnTypeOfElement(Element element) {
@@ -447,7 +447,7 @@ class SimpleTypesInferrer extends TypesInferrer {
   }
 
   /**
-   * Returns the type of [element]. Returns [:Dynamic:] if
+   * Returns the type of [element]. Returns [:dynamic:] if
    * [element] has not been analyzed yet.
    */
   TypeMask typeOfElement(Element element) {
@@ -974,7 +974,7 @@ class SimpleTypeInferrerVisitor extends ResolvedVisitor<TypeMask> {
 
     Selector getterSelector =
         elements.getGetterSelectorInComplexSendSet(node);
-    Selector operatorSelector = 
+    Selector operatorSelector =
         elements.getOperatorSelectorInComplexSendSet(node);
     Selector setterSelector = elements.getSelector(node);
 
@@ -984,7 +984,7 @@ class SimpleTypeInferrerVisitor extends ResolvedVisitor<TypeMask> {
     TypeMask receiverType = element != null
         ? inferrer.dynamicType
         : visit(node.receiver);
-      
+
     TypeMask rhsType = isIncrementOrDecrement
         ? inferrer.intType
         : node.isIndex
@@ -1095,7 +1095,7 @@ class SimpleTypeInferrerVisitor extends ResolvedVisitor<TypeMask> {
     } else {
       analyzeArguments(node.arguments);
       // Closure call on a getter. We don't have function types yet,
-      // so we just return [:Dynamic:].
+      // so we just return [:dynamic:].
       return inferrer.dynamicType;
     }
   }
diff --git a/sdk/lib/_internal/dartdoc/lib/dartdoc.dart b/sdk/lib/_internal/dartdoc/lib/dartdoc.dart
index 26579b43088..2610c3d9a8a 100644
--- a/sdk/lib/_internal/dartdoc/lib/dartdoc.dart
+++ b/sdk/lib/_internal/dartdoc/lib/dartdoc.dart
@@ -1671,7 +1671,7 @@ class Dartdoc {
   annotateType(ContainerMirror enclosingType,
                TypeMirror type,
                [String paramName = null]) {
-    // Don't bother explicitly displaying Dynamic.
+    // Don't bother explicitly displaying dynamic.
     if (type.isDynamic) {
       if (paramName != null) write(paramName);
       return;
@@ -1701,7 +1701,7 @@ class Dartdoc {
       return;
     }
     if (type.isDynamic) {
-      // Do not generate links for Dynamic.
+      // Do not generate links for dynamic.
       write('dynamic');
       return;
     }
diff --git a/tests/compiler/dart2js/mirrors_test.dart b/tests/compiler/dart2js/mirrors_test.dart
index 20c3f35e59a..f32e36e8ea1 100644
--- a/tests/compiler/dart2js/mirrors_test.dart
+++ b/tests/compiler/dart2js/mirrors_test.dart
@@ -110,7 +110,7 @@ void testFoo(MirrorSystem system, LibraryMirror helperLibrary,
                 "Unexpected library returned from type");
 
   Expect.isFalse(fooClass.isObject, "Class is Object");
-  Expect.isFalse(fooClass.isDynamic, "Class is Dynamic");
+  Expect.isFalse(fooClass.isDynamic, "Class is dynamic");
   Expect.isFalse(fooClass.isVoid, "Class is void");
   Expect.isFalse(fooClass.isTypeVariable, "Class is a type variable");
   Expect.isFalse(fooClass.isTypedef, "Class is a typedef");
@@ -437,7 +437,7 @@ void testBar(MirrorSystem system, LibraryMirror helperLibrary,
                 "Unexpected library returned from type");
 
   Expect.isFalse(barClass.isObject, "Interface is Object");
-  Expect.isFalse(barClass.isDynamic, "Interface is Dynamic");
+  Expect.isFalse(barClass.isDynamic, "Interface is dynamic");
   Expect.isFalse(barClass.isVoid, "Interface is void");
   Expect.isFalse(barClass.isTypeVariable, "Interface is a type variable");
   Expect.isFalse(barClass.isTypedef, "Interface is a typedef");
@@ -531,7 +531,7 @@ void testBaz(MirrorSystem system, LibraryMirror helperLibrary,
                 "Unexpected library returned from type");
 
   Expect.isFalse(bazClass.isObject, "Class is Object");
-  Expect.isFalse(bazClass.isDynamic, "Class is Dynamic");
+  Expect.isFalse(bazClass.isDynamic, "Class is dynamic");
   Expect.isFalse(bazClass.isVoid, "Class is void");
   Expect.isFalse(bazClass.isTypeVariable, "Class is a type variable");
   Expect.isFalse(bazClass.isTypedef, "Class is a typedef");
@@ -642,12 +642,12 @@ void testBaz(MirrorSystem system, LibraryMirror helperLibrary,
 
   var dynamicType = method1.returnType;
   Expect.isNotNull(dynamicType, "Return type was null");
-  Expect.isFalse(dynamicType.isObject, "Dynamic is Object");
-  Expect.isTrue(dynamicType.isDynamic, "Dynamic is not Dynamic");
-  Expect.isFalse(dynamicType.isVoid, "Dynamic is void");
-  Expect.isFalse(dynamicType.isTypeVariable, "Dynamic is a type variable");
-  Expect.isFalse(dynamicType.isTypedef, "Dynamic is a typedef");
-  Expect.isFalse(dynamicType.isFunction, "Dynamic is a function");
+  Expect.isFalse(dynamicType.isObject, "dynamic is Object");
+  Expect.isTrue(dynamicType.isDynamic, "dynamic is not dynamic");
+  Expect.isFalse(dynamicType.isVoid, "dynamic is void");
+  Expect.isFalse(dynamicType.isTypeVariable, "dynamic is a type variable");
+  Expect.isFalse(dynamicType.isTypedef, "dynamic is a typedef");
+  Expect.isFalse(dynamicType.isFunction, "dynamic is a function");
 
   var method1Parameters = method1.parameters;
   Expect.isNotNull(method1Parameters, "Method parameters is null");
@@ -697,7 +697,7 @@ void testBaz(MirrorSystem system, LibraryMirror helperLibrary,
   var voidType = method2.returnType;
   Expect.isNotNull(voidType, "Return type was null");
   Expect.isFalse(voidType.isObject, "void is Object");
-  Expect.isFalse(voidType.isDynamic, "void is Dynamic");
+  Expect.isFalse(voidType.isDynamic, "void is dynamic");
   Expect.isTrue(voidType.isVoid, "void is not void");
   Expect.isFalse(voidType.isTypeVariable, "void is a type variable");
   Expect.isFalse(voidType.isTypedef, "void is a typedef");
@@ -811,7 +811,7 @@ void testBaz(MirrorSystem system, LibraryMirror helperLibrary,
   Expect.stringEquals("mirrors_helper.Func", funcTypedef.qualifiedName,
                       "Unexpected simpleName");
   Expect.isFalse(funcTypedef.isObject, "Typedef is Object");
-  Expect.isFalse(funcTypedef.isDynamic, "Typedef is Dynamic");
+  Expect.isFalse(funcTypedef.isDynamic, "Typedef is dynamic");
   Expect.isFalse(funcTypedef.isVoid, "Typedef is void");
   Expect.isFalse(funcTypedef.isTypeVariable, "Typedef is a type variable");
   Expect.isTrue(funcTypedef.isTypedef, "Typedef is not a typedef");
diff --git a/tests/corelib/collection_test.dart b/tests/corelib/collection_test.dart
index 64dfe2b65ea..8ef81f7a042 100644
--- a/tests/corelib/collection_test.dart
+++ b/tests/corelib/collection_test.dart
@@ -31,10 +31,10 @@ main() {
   }
   new CollectionTest(fixedList);
 
-  // Dynamic size list.
+  // Growable list.
   new CollectionTest(new List.from(TEST_ELEMENTS));
 
-  // Dynamic size set.
+  // Set.
   new CollectionTest(new Set.from(TEST_ELEMENTS));
 
   // Queue.
diff --git a/tools/utils/textmate/Dart.tmbundle/Syntaxes/Dart.textmate b/tools/utils/textmate/Dart.tmbundle/Syntaxes/Dart.textmate
index d04d533a71c..adfc7fce9bd 100644
--- a/tools/utils/textmate/Dart.tmbundle/Syntaxes/Dart.textmate
+++ b/tools/utils/textmate/Dart.tmbundle/Syntaxes/Dart.textmate
@@ -112,7 +112,7 @@
 					match = '\b(static|final|const)\b';
 				},
 				{	name = 'storage.type.primitive.dart';
-					match = '\b(?:void|bool|num|int|double|Dynamic|var|String)\b';
+					match = '\b(?:void|bool|num|int|double|dynamic|var|String)\b';
 				},
 			);
 		};
diff --git a/tools/utils/textmate/Dart.tmbundle/Syntaxes/Dart.tmLanguage b/tools/utils/textmate/Dart.tmbundle/Syntaxes/Dart.tmLanguage
index 2d6304a6fa1..61727e2a710 100644
--- a/tools/utils/textmate/Dart.tmbundle/Syntaxes/Dart.tmLanguage
+++ b/tools/utils/textmate/Dart.tmbundle/Syntaxes/Dart.tmLanguage
@@ -268,7 +268,7 @@
 				</dict>
 				<dict>
 					<key>match</key>
-					<string>\b(?:void|bool|num|int|double|Dynamic|var|String)\b</string>
+					<string>\b(?:void|bool|num|int|double|dynamic|var|String)\b</string>
 					<key>name</key>
 					<string>storage.type.primitive.dart</string>
 				</dict>
diff --git a/utils/template/htmltree.dart b/utils/template/htmltree.dart
index 16db0a9f22e..2d08b02bc65 100644
--- a/utils/template/htmltree.dart
+++ b/utils/template/htmltree.dart
@@ -361,10 +361,10 @@ class TreePrinter implements TreeVisitor {
   void visitTemplateDocument(TemplateDocument node) {
     output.heading('Content', node.span);
     output.depth++;
-    // TODO(terry): Ugly use of 'as Dynamic' instead of children[0] to
+    // TODO(terry): Ugly use of 'as dynamic' instead of children[0] to
     //              surpress warning.
     assert(node.children.length == 1 &&
-        (node.children as Dynamic)[0].tagTokenId == -1);
+        (node.children as dynamic)[0].tagTokenId == -1);
     output.writeNodeList("document", node.children);
     output.depth--;
   }