sinus

sinus
n.
1) an air cavity within a bone, especially any of the cavities within the bones of the face or skull (see paranasal sinuses).
2) any wide channel containing blood, usually venous blood. Venous sinuses occur, for example, in the dura mater and drain blood from the brain.
3) a pocket or bulge in a tubular organ, especially a blood vessel; for example, the carotid sinus.
4) (sinus tract) a blind-ending infected epithelium-lined tract leading from a focus of infection to the surface of the skin or a hollow organ.

The new mediacal dictionary. 2014.

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  • sinus — 1. (si nus ) s. m. 1°   En géométrie, le sinus d un arc ou d un angle est la perpendiculaire abaissée d une extrémité de l arc sur le diamètre qui passe par l autre extrémité. •   Il est indubitable, et en cela Descartes mérite un coup d… …   Dictionnaire de la Langue Française d'Émile Littré

  • Sinus — may refer to:In anatomy, where a sinus is a sac or cavity in any organ or tissue: *Sinus (anatomy), description of the general term *Anal sinuses, the furrows which separate the columns in the rectum *Paranasal sinuses, air cavities in the… …   Wikipedia

  • SINUS — Veteribus quod inter brachia ad summum pectus intercipitur, dictum est i vide supra Gremium, unde et recessus littorum, in quos se mare insinuat, Sinus; et Sinum vestium vocavêre, quodcumque partem illam corporis regeret, Tunicae, Togae,… …   Hofmann J. Lexicon universale

  • Sinus — Sm (eine trigonometrische Funktion) per. Wortschatz fach. (19. Jh.) Entlehnung. Entlehnt aus l. sinus Krümmung ; dieses übersetzt arab. ǧaib, das aber in der mathematischen Bedeutung auf ein anderes Wort zurückgeht (ai. jīvā Bogensehne ).… …   Etymologisches Wörterbuch der deutschen sprache

  • Sinus — 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. [1913 Webster] 2. A bay of the sea; a recess in the shore. [1913 Webster] 3 …   The Collaborative International Dictionary of English

  • Sinus — 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. [1913 Webster] 2. A bay of the sea; a recess in the shore. [1913 Webster] 3 …   The Collaborative International Dictionary of English

  • sinus — 1590s, abscess, sore, from M.L. sinus, from L. sinus bend, fold, curve. Meaning hollow curve or cavity in the body is attested from 1670s. Sinusitis inflammation of a sinus is recorded from 1896 …   Etymology dictionary

  • Sinus — eines Winkels φ ist in einem rechtwinkligen Dreieck, das den Winkel φ besitzt, das Verhältnis der gegenüberliegenden Kathete zur Hypotenuse. Die Sinusfunktion ist die Umkehrung des Integrals Dieselbe hat die Periode 2π, und… …   Lexikon der gesamten Technik

  • sinus — sínus m DEFINICIJA 1. anat. a. polukružna koštana šupljina prevučena sluznicom [paranazalni sinusi; upala sinusa] b. izbočenja ili proširenja šupljih organa c. (mn) vezivni kanali smješteni između dva lista tvrde moždine 2. mat. trigonometrijska… …   Hrvatski jezični portal

  • sinus — m. anat. Seno. Medical Dictionary. 2011 …   Diccionario médico

  • sinus — has the plural form sinuses. In Latin the plural is sinus, not sini …   Modern English usage

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