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English word
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WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
THESAURUS
ROGET THESAURUS
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WORDNET DICTIONARY
Noun Sinus has 3 senses
- sinus(n = noun.body) fistula - an abnormal passage leading from a suppurating cavity to the body surface; is a kind of passage, passageway
- sinus(n = noun.body) - any of various air-filled cavities especially in the bones of the skull; has particulars: ethmoid sinus, ethmoidal sinus, sinus ethmoidales, frontal sinus, maxillary sinus, nasal sinus, paranasal sinus, sinus paranasales
- sinus(n = noun.body) venous sinus - a wide channel containing blood; does not have the coating of an ordinary blood vessel; is a kind of canal, channel, duct, epithelial duct
is a kind of bodily cavity, cavity, cavum
has particulars: cavernous sinus, sinus cavernosus, coronary sinus, sinus coronarius, sigmoid sinus, sinus sigmoideus, sinus rectus, straight sinus, tentorial sinus, sinus transversus, transverse sinus
CIDE DICTIONARY
Sinus, n. [L., a bent surface, a curve, the folds or bosom of a garment, etc., a bay. Cf. Sine, n. ].
- An opening; a hollow; a bending. [1913 Webster]
- A bay of the sea; a recess in the shore. [1913 Webster]
- A cavity; a depression. [1913 Webster]
- A narrow, elongated cavity, in which pus is collected; an elongated abscess with only a small orifice. [1913 Webster]
- A depression between adjoining lobes. [1913 Webster]" A sinus may be rounded, as in the leaf of the white oak, or acute, as in that of the red maple." [1913 Webster]
OXFORD DICTIONARY
Sinus, n.
1 a cavity of bone or tissue, esp. in the skull connecting with the nostrils.
2 Med. a fistula esp. to a deep abscess.
3 Bot. the curve between the lobes of a leaf.
1 a cavity of bone or tissue, esp. in the skull connecting with the nostrils.
2 Med. a fistula esp. to a deep abscess.
3 Bot. the curve between the lobes of a leaf.
Etymology
L, = bosom, recess