Dictionary:

hyoid

  (hī'oid')

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Of or relating to the hyoid bone.

The hyoid bone.

[New Latin h[ymacr]oīdēs, the hyoid bone, from Greek hūoeidēs, shaped like the letter upsilon : hū, upsilon + -oeidēs, -oid.]

1. Shaped like the letter U.
2. Of or relating to the hyoid bone.

The hyoid bone.

1. shaped like Greek letter upsilon (υ).
2. pertaining to the hyoid bone.

• h. apparatus — the suspensory mechanism for the tongue and larynx. Consists of the single basihyoid, and the paired thyrohyoid, ceratohyoid, epihyoid and stylohyoid bones and the tympanohyoid cartilages.
• h. bone — one or more of the bones of the hyoid apparatus, fused in some species (e.g. human) to form a horseshoe-shaped bone situated at the base of the tongue, just below the thyroid cartilage. See also Table 10.

The noun has one meaning:

Meaning #1: a U-shaped bone at the base of the tongue that supports the tongue muscles
  Synonyms: hyoid bone, os hyoideum

The adjective hyoid has one meaning:

Meaning #1: of or relating to the hyoid bone
  Pertains to noun: hyoid bone (meaning #1)