Definition of Sinus

Noun: sinus  sI-nus

1. An abnormal passage leading from a suppurating cavity to the body surface
   - fistula
    
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
   - venous sinus

See also:
sinuousnesses
sinuses

Anagrams containing the word sinus

sunsi ssinu ussin nussi inuss