The Collaborative International Dictionary
Hypural
Hypural \Hy*pu"ral\, a. [Pref. hypo- + Gr. ? tail.] (Anat.) Under the tail; -- applied to the bones which support the caudal fin rays in most fishes.
Wiktionary
hypural
a. (context anatomy English) Under the tail; applied to the bones that support the caudal fin rays in most fishes.