Definition of costae:
(n) :
(anatomy) Synonym of rib.
(n) :
(botany, zootomy) A riblike part of a plant or animal, such as a midrib of a leaf or a thickened vein or the margin of an insect wing.
(n) :
(entomology) The vein forming the leading edge of most insect wings.
(n) :
A surname from Spanish.
(n) :
A surname from the Romance languages.
(n) :
A surname from Italian.