sinus has definitions from the fields of anatomy,zoology
1
[ noun ] (anatomy,zoology) any of various air-filled cavities especially in the bones of the skull
2
[ noun ] (anatomy,zoology) an abnormal passage leading from a suppurating cavity to the body surface

Synonyms

fistula

Related terms

passage

3
[ noun ] (anatomy,zoology) a wide channel containing blood; does not have the coating of an ordinary blood vessel

Synonyms

venous_sinus

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