About The Word Sinus

Bay Area Crosswords

Learn about the word Sinus to help solve your crossword puzzle. Discover Sinus definitions and meaning, origins, synonyms, related terms and more at the free Crossword Dictionary.

Sinus

Sinus Meaning & Definition
Sinus Definition And Meaning

What's The Definition Of Sinus?

[n] a wide channel containing blood; does not have the coating of an ordinary blood vessel
[n] any of various air-filled cavities especially in the bones of the skull
[n] an abnormal passage leading from a suppurating cavity to the body surface

Synonyms | Synonyms for Sinus: fistula | venous sinus

Related Terms | Find terms related to Sinus:

See Also | bodily cavity | canal | cavernous sinus | cavity | cavum | channel | coronary sinus | duct | epithelial duct | ethmoid sinus | ethmoidal sinus | frontal sinus | maxillary sinus | nasal sinus | paranasal sinus | passage | passageway | sigmoid sinus | sinus cavernosus | sinus coronarius | sinus ethmoidales | sinus paranasales | sinus rectus | sinus sigmoideus | sinus transversus | straight sinus | tentorial sinus | transverse sinus

Sinus In Webster's Dictionary

\Si"nus\, n.; pl. L. {Sinus}, E. {Sinuses}. [L., a bent surface, a curve, the folds or bosom of a garment, etc., a bay. Cf. {Sine}, n.] 1. An opening; a hollow; a bending. 2. A bay of the sea; a recess in the shore. 3. (Anat. & Zo["o]l.) A cavity; a depression. Specifically: (a) A cavity in a bone or other part, either closed or with a narrow opening. (b) A dilated vessel or canal. 4. (Med.) A narrow, elongated cavity, in which pus is collected; an elongated abscess with only a small orifice. 5. (Bot.) A depression between adjoining lobes. Note: A sinus may be rounded, as in the leaf of the white oak, or acute, as in that of the red maple. {Pallial sinus}. (Zo["o]l.) See under {Pallial}. {Sinus venosus}. [L., venous dilatation.] (Anat.) (a) The main part of the cavity of the right auricle of the heart in the higher vertebrates. (b) In the lower vertebrates, a distinct chamber of the heart formed by the union of the large systematic veins and opening into the auricle.

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