Sinus

['saɪnəs]

Definition

(noun.) any of various air-filled cavities especially in the bones of the skull.

Inputed by Betty--From WordNet

Definition

(pl. ) of Sinus

(n.) An opening; a hollow; a bending.

(n.) A bay of the sea; a recess in the shore.

(n.) A cavity; a depression.

(n.) A cavity in a bone or other part, either closed or with a narrow opening.

(n.) A dilated vessel or canal.

(n.) A narrow, elongated cavity, in which pus is collected; an elongated abscess with only a small orifice.

(n.) A depression between adjoining lobes.

Editor: Susanna

Synonyms and Synonymous

n. [L.] [1]. Bay, recess.[2]. Fold, hollow, cavity.

Inputed by Celia

Definition

n. a bending: a fold: an opening: a bay of the sea: a recess on the shore: (anat.) a cavity or hollow of bone or other tissue one of the air-cavities contained in the interior of certain bones: a channel for transmitting venous blood: a narrow opening leading to an abscess &c.—n. Sī′nusoid the curve of sines in which the abscisses are proportional to an angle and the ordinates to its sine.—adj. Sinusoi′dal.—adv. Sinusoi′dally.

Checker: Marty