Thyroid

Definition
The largest cartilage, the thyroid, has a shield-like shape, and is positioned anterior to the arytenoid cartilages, which its sides enclose, and superior to the cricoid cartilage. It forms an angle in the front that is more acute in men (90 degrees) than in women (120 degrees), hence the common term Adam's apple.

Links

 * Utrecht Lexicon of Linguistics