subcostal

(noun, adjective)

adjective

1. (anatomy) Below a rib or the ribs

2. # (entomology) Pertaining to the subcosta and/or the area of the wing next to it.

noun

1. (anatomy) A subcostal muscle.

2. (zoology) One of the principal nervures of the wings of an insect. It is situated next beneath or behind the costal.