2. (Zoöl.)
Defn: The posterior section of the body, behind the thorax, in insects, crustaceans, and other Arthropoda.
ABDOMINAL
Ab*dom"i*nal, a. Etym: [Cf. F. abdominal.]
1. Of or pertaining to the abdomen; ventral; as, the abdominal regions, muscles, cavity.
2. (Zoöl.)
Defn: 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.
ABDOMINAL
Ab*dom"i*nal, n.; E. pl. Abdominals, L. pl. Abdominales.
Defn: A fish of the group Abdominales.
ABDOMINALES
Ab*dom`i*na"les, n. pl. Etym: [NL., masc. pl.] (Zoöl.)
Defn: A group including the greater part of fresh-water fishes, and many marine ones, having the ventral fins under the abdomen behind the pectorals.