sinus
英 ['saɪnəs]
美['saɪnəs]
- n. [生物] 窦；静脉窦；下陷或凹下去的地方
英英释意
- 1. an abnormal passage leading from a suppurating cavity to the body surface
- 2. any of various air-filled cavities especially in the bones of the skull
- 3. a wide channel containing blood; does not have the coating of an ordinary blood vessel