• word of the day

    sinus

    sinus - Dictionary definition and meaning for word sinus

    Definition
    (noun) an abnormal passage leading from a suppurating cavity to the body surface
    Synonyms : fistula
    Definition
    (noun) any of various air-filled cavities especially in the bones of the skull Definition
    (noun) a wide channel containing blood; does not have the coating of an ordinary blood vessel
    Synonyms : venous sinus
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