1. Resembling a sinus. 2. Sinusoidal capillary; a thin-walled terminal blood vessel having an irregular and larger caliber than an ordinary capillary; its endothelial cells have large gaps and the basal lamina is either discontinuous or absent. SYN: sinusoidal capillary. [sinus + G. eidos, resemblance]
- uterine s. SYN: uterine sinus.

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si·nu·soid 'sī-n(y)ə-.sȯid n a minute endothelium-lined space or passage for blood in the tissues of an organ (as the liver)
si·nu·soi·dal .sī-n(y)ə-'sȯid-əl adj
si·nu·soi·dal·ly -əl-ē adv

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a small blood vessel found in certain organs, such as the adrenal gland and liver. Large numbers of sinusoids occur in the liver. They receive oxygen-rich blood from the hepatic artery and nutrients from the intestines via the portal vein. Oxygen and nutrients diffuse through the capillary walls into the liver cells. The sinusoids are drained by the hepatic veins. See also portal system.

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si·nus·oid (siґnə-soid) [sinus + -oid] 1. resembling a sinus. 2. vas sinusoideum.

Medical dictionary. 2011.

Look at other dictionaries:

  • Sinusoid — Si nus*oid, n. [Sinus + oid.] (Geom.) The curve whose ordinates are proportional to the sines of the abscissas, the equation of the curve being y = a sin x. It is also called the {curve of sines}. [1913 Webster] …   The Collaborative International Dictionary of English

  • sinusoid — 1823 in mathematics; 1900 in physiology, from SINUS (Cf. sinus) + OID (Cf. oid). Related: Sinusoidal …   Etymology dictionary

  • sinusoid — [sī′nəs oid΄] n. SINE CURVE sinusoidal adj …   English World dictionary

  • Sinusoid — Ein Sinusoid (Adjektiv sinusoidal) ist eine sinusförmige Funktion, die aus der Sinusfunktion durch Skalierung von Amplitude und Frequenz sowie Phasenverschiebung gebildet wird: . Darin ist A die Skalierung der Amplitude, ω die Skalierung der… …   Deutsch Wikipedia

  • sinusoid — sinusoidė statusas T sritis automatika atitikmenys: angl. sinusoid vok. Sinusoide, f rus. синусоида, f pranc. sinusoïde, f …   Automatikos terminų žodynas

  • sinusoid — sinusoidė statusas T sritis fizika atitikmenys: angl. sine curve; sinusoid vok. Sinuskurve, f; Sinusoide, f rus. синусоида, f pranc. courbe sinusoïdale, f; sinusoïde, f …   Fizikos terminų žodynas

  • sinusoid — noun Etymology: Medieval Latin sinus sine Date: 1823 1. sine curve, sine wave 2. [New Latin sinus] a minute endothelium lined space or passage for blood in the tissues of an organ (as the liver) …   New Collegiate Dictionary

  • sinusoid — /suy neuh soyd /, n. Math. a curve described by the equation y = a sin x, the ordinate being proportional to the sine of the abscissa. [1815 25; SINUS + OID] * * * ▪ anatomy       irregular tubular space for the passage of blood, taking the place …   Universalium

  • sinusoid — 1. noun a) A sine curve. b) Any of several channels through which venous blood passes in various organs. 2. adjective a) sinusoidal. b) That resembles a …   Wiktionary

  • sinusoid — sinuso|i̱d [↑Sinus u. ↑]: hohlraumähnlich …   Das Wörterbuch medizinischer Fachausdrücke

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