'Hyoid bone' definitions:

Definition of 'hyoid bone'

noun

A U-shaped bone at the base of the tongue that supports the tongue muscles [syn: hyoid, hyoid bone, os hyoideum]

From: GCIDE

Hyoid \Hy"oid\, a. [Gr. ? fr. the letter [Upsilon] + e'i^dos form: cf. F. hyo["i]de.]
1. Having the form of an arch, or of the Greek letter upsilon [[Upsilon]]. [1913 Webster]
2. (Anat.) Of or pertaining to the bony or cartilaginous arch which supports the tongue. Sometimes applied to the tongue itself. [1913 Webster]
Hyoid arch (Anat.), the arch of cartilaginous or bony segments, which connects the base of the tongue with either side of the skull.
Hyoid bone (Anat.), the bone in the base of the tongue, the middle part of the hyoid arch. [1913 Webster]