diff --git a/js/common/model/billiards/BilliardsTable.js b/js/common/model/billiards/BilliardsTable.js
index 3a0fb2e0..fce94d2c 100644
--- a/js/common/model/billiards/BilliardsTable.js
+++ b/js/common/model/billiards/BilliardsTable.js
@@ -56,7 +56,7 @@ function BilliardsTable( options ) {
   this.ballVelocity = new Vector2( 0, 0 );
 
   // Keep track of collision points so the path can be shown as an array of lines.
-  // @public {ObservableArray.<Vector2>} (read-only) - the points where the ball has collided with the walls
+  // @public {ObservableArrayDef.<Vector2>} (read-only) - the points where the ball has collided with the walls
   this.collisionPoints = createObservableArray();
 
   // @public {Emitter} (read-only) - emits when the ball was restarted
diff --git a/js/common/model/paint/Splotch.js b/js/common/model/paint/Splotch.js
index 44170bc4..d29f94a8 100644
--- a/js/common/model/paint/Splotch.js
+++ b/js/common/model/paint/Splotch.js
@@ -52,10 +52,10 @@ function Splotch( initialLeftCount, initialRightCount, visibleProperty, controls
     return Math.min( value, ProportionPlaygroundConstants.PAINT_COUNT_RANGE.max );
   } );
 
-  // @public {ObservableArray.<PaintBalloon>}
+  // @public {ObservableArrayDef.<PaintBalloon>}
   this.balloons = createObservableArray();
 
-  // @public {ObservableArray.<PaintDrip>}
+  // @public {ObservableArrayDef.<PaintDrip>}
   this.drips = createObservableArray();
 
   SceneRatio.call( this, visibleProperty, controlsVisibleProperty,
diff --git a/js/common/view/billiards/BilliardsPath.js b/js/common/view/billiards/BilliardsPath.js
index 706c103f..c81abee9 100644
--- a/js/common/view/billiards/BilliardsPath.js
+++ b/js/common/view/billiards/BilliardsPath.js
@@ -25,7 +25,7 @@ const LINE_OPTIONS = {
  * @extends {Node}
  *
  * @param {ModelViewTransform2} modelViewTransform
- * @param {ObservableArray.<Vector2>} collisionPoints - In model coordinates
+ * @param {ObservableArrayDef.<Vector2>} collisionPoints - In model coordinates
  * @param {Property.<Vector2>} ballPositionProperty - In model coordinates
  */
 function BilliardsPath( modelViewTransform, collisionPoints, ballPositionProperty ) {
@@ -38,7 +38,7 @@ function BilliardsPath( modelViewTransform, collisionPoints, ballPositionPropert
   // @private {ModelViewTransform2}
   this.modelViewTransform = modelViewTransform;
 
-  // @private {ObservableArray.<Vector2>}
+  // @private {ObservableArrayDef.<Vector2>}
   this.collisionPoints = collisionPoints;
 
   // @private {Vector2}