Definition of genioglossal in US English:

genioglossal

adjective

  • Designating the genioglossus muscle; of or relating to this muscle.

noun

  • In plural: = genioglossusrare.

Origin

Early 19th century; earliest use found in Charles Bell (1774–1842), physiologist and surgeon. From genioglossus or its etymon post-classical Latin genioglossus + -al.