Definition of geniohyoid in US English:

geniohyoid

adjective

  • Designating a narrow muscle originating from the inferior genial tubercle and inserting onto the body of the hyoid bone, which acts to draw the hyoid bone forwards and to depress the jaw; of or relating to this muscle.

noun

  • The geniohyoid muscle.

Origin

Early 19th century. After post-classical Latin geniohyoideus; compare hyoid.