hyoid bone

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A U-shaped bone at the base of the tongue that supports the muscles of the tongue.

Wiktionary

1. n. A bone in the human neck which supports the tongue.

GNU Webster's 1913

1. adj. the bone in the base of the tongue, the middle part of the hyoid arch.

WordNet 3.0

1. n. a U-shaped bone at the base of the tongue that supports the tongue muscles