• Webster's Revised Unabridged Dictionary
    • a Hypohyal (Anat) Pertaining to one or more small elements in the hyoidean arch of fishes, between the caratohyal and urohyal.
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Century Dictionary and Cyclopedia
    • n hypohyal In fishes, one of two pairs of bones situated on each side of the anterior end of the hyoid arch. They are attached one above the other to the ceratohyal. Between the superior pair is the glossohyal and between the inferior pair is the urohyal.
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Webster's Revised Unabridged Dictionary
Pref. hypo-, + Greek letter


In literature:

A ceratohyal then is attached posteriorly to the hypohyal and a stylohyal ligament is attached to each ceratohyal posteriorly.
"Genera and Subgenera of Chipmunks" by John A. White