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nouna wide channel containing blood; does not have the coating of an ordinary blood vessel
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nounan abnormal passage leading from a suppurating cavity to the body surface
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nounany of various air-filled cavities especially in the bones of the skulltype of:
Synonyms & Similar Words
channel passage canal duct cavity passageway fistula cavum venous sinus epithelial duct sinus coronarius tentorial sinus coronary sinus transverse sinus sinus rectus sinus sigmoideus straight sinus sinus transversus cavernous sinus sigmoid sinus sinus cavernosus bodily cavity paranasal sinus ethmoid sinus ethmoidal sinus frontal sinus maxillary sinus nasal sinus sinus ethmoidales sinus paranasales