Definition of sinus

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  • sinus is a valid Scrabble US word with a point value of 5
  • sinus is a valid Scrabble UK word with a point value of 5
  • sinus is a valid Words with friends word with a point value of 7

Definition of sinus

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

    Synonyms

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

    Synonyms

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

See definition of sinus in Merriam Webster