1 Of or pertaining to the abdomen; ventral; as, the abdominal regions, muscles, cavity.
Having abdominal fins; belonging to the Abdominales; as, abdominal fishes. Abdominal ring (Anat.), a fancied ringlike opening on each side of the abdomen, external and superior to the pubes; — called also inguinal ring.
A fish of the group Abdominales.