Is the hyoid bone the Adam's apple?

No.
The laryngeal prominence—commonly known as the Adam's Apple—is a feature of the human neck. This lump, or protrusion, is formed by the angle of the thyroid cartilage surrounding the larynx.

https://en.wikipedia.org/wiki/Adams_Apple

No.

http://simple.wikipedia.org/wiki/Adam's_apple

No, it isn't.

The Adam's apple isn't a bone at all. It's a piece of apple that got stuck.... No, just kidding.

"The laryngeal prominence—commonly known as the Adam's Apple—is a feature of the human neck. This lump, or protrusion, is formed by the angle of the thyroid cartilage surrounding the larynx."

https://en.wikipedia.org/wiki/Adam%27s_apple

Here's an illustration from the real Gray's Anatomy.
https://en.wikipedia.org/wiki/Image:Gray1194.png