SINUS

• (noun) a wide channel containing blood; does not have the coating of an ordinary blood vessel

  synonyms : venous sinus

• (noun) any of various air-filled cavities especially in the bones of the skull

• (noun) an abnormal passage leading from a suppurating cavity to the body surface

  synonyms : fistula

WordNet® 3.0, © 2006 by Princeton University.

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