carina [kəˈrʌɪnə, -ˈriː-] (pl. carinae -niː 或 carinas)
(chiefly Biology)a keel-shaped structure, in particular (主 生)龙骨状突起,尤指 ■(Zoology)the ridge of a bird's breastbone, to which the main flight muscles are attached (动)(鸟的)胸骨突起,(胸骨)龙骨突起 ■(Anatomy)a cartilage situated at the point where the trachea (windpipe) divides into the two bronchi (剖)隆凸,嵴状结构