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The Collaborative International Dictionary
Hyosternal

Hyosternal \Hy`o*ster"nal\, a. [Hyo- + ternal.] (Anat.)

  1. Between the hyoid bone and the sternum, or pertaining to them; infrahyoid; as, the hyosternal region of the neck.

  2. Pertaining to the hyosternum of turtles.

Wiktionary
hyosternal

a. 1 (context anatomy English) Between the hyoid bone and the sternum, or relating to both of them; infrahyoid. 2 (context anatomy English) Pertaining to the hyosternum of turtles.