名詞 costa:

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)
   同義詞：rib

cos.ta

n.（名詞）
【復(fù)數(shù)】 cos.tae[-tô] 【生物學(xué)】
A rib or a riblike part, such as the midrib of a leaf or a thickened anterior vein or margin of an insect`s wing.
肋骨，葉脈：肋骨或肋骨狀部分，例如葉子的中脈或昆蟲翼的較厚的前部線或邊

來源：
Latin * see kost-
拉丁語 *參見 kost-

【引伸】
cos.tal
adj.（形容詞）