Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
a groove in the lower inner border of the rib, lodging the intercostal vessels and nerve.
a groove along the inferior margin of the superior rib that accommodates the intercostal nerves and associated major arteries and veins.
A furrow along the lower internal border of a rib; the intercostal vessels and nerve run in this groove.
See also: groove