Hȳ'oid or Hȳ-oid'e-an, a.

a. [Fr. hyōide, Gr. ὑοειδής, from letter υ, and εἶδος, form.] Having the form of an arch, or of the Greek letter upsilon [υ].

Hyoid bone (Anat.), a bone at the base of the tongue, being a movable osseous arch, convex before, and suspended in the substance of the softer parts of the neck. Dunglison.