Pronunciation: (in"tur-kos'tl, -kô'stl), [key]
1. pertaining to muscles, parts, or intervals between the ribs.
2. situated between the ribs.
3. Shipbuilding.noting a structural member situated between or divided by continuous members, as frames or keelsons.
an intercostal muscle, member, or space.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.