I. abˈdämən ə l, əb- adjective
Etymology: French, from abdomin- + -al
1. : of or belonging to the abdomen : ventral
abdominal muscle
2. of a fish : having the pelvic or ventral fins under the abdomen and behind the pectoral fins
II. noun
( -s )
: an abdominal element (as a vein or muscle)