Source : WordNet®

costae
     See {costa}

costa
     n 1: a riblike part of a plant or animal (such as a middle rib of
          a leaf or a thickened vein of an insect wing)
     2: any of the 12 pairs of curved arches of bone extending from
        the spine to or toward the sternum in humans (and similar
        bones in most vertebrates) [syn: {rib}]
     [also: {costae} (pl)]