Synonyms for sinus

Noun

1. fistula, sinus, passage, passageway

usage: an abnormal passage leading from a suppurating cavity to the body surface

2. sinus, cavity, bodily cavity, cavum

usage: any of various air-filled cavities especially in the bones of the skull

3. venous sinus, sinus, duct, epithelial duct, canal, channel

usage: a wide channel containing blood; does not have the coating of an ordinary blood vessel