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Sinusoid

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Sine Wave
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si⋅nus⋅oid

  [sahy-nuh-soid]
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–noun Mathematics.
a curve described by the equation y = a sin x, the ordinate being proportional to the sine of the abscissa.
Origin:
1815–25; sinus + -oid
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Sine Wave
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sine curve  


(click for larger image in new window)
n.  The graph of the equation y = sin x. Also called sinusoid.
si·nu·soid   (sī'nə-soid', -nyə-)   
n.  

  1. Mathematics See sine curve.

  2. Anatomy Any of the venous cavities through which blood passes in various glands and organs, such as the adrenal gland and the liver.


[Medieval Latin sinus, sine; see sine + -oid.]
si'nu·soi'dal (-soid'l) adj., si'nu·soi'dal·ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: si·nu·soid
Pronunciation: 'sI-n(y)&-"soid
Function: noun
: a minute endothelium-lined space or passage for blood in the tissuesof an organ (as the liver) —si·nu·soi·dal /"sI-n(y)&-'soid-&l/ adjective —si·nu·soi·dal·ly /-&l-E/ adverb
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

sinusoid si·nu·soid (sī'nə-soid', -nyə-)
n.
Any of the venous cavities through which blood passes in various glands and organs, such as the adrenal gland and the liver. adj.
Resembling a sinus.

si'nu·soi'dal (-soid'l) adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia

sinusoid

irregular tubular space for the passage of blood, taking the place of capillaries and venules in the liver, spleen, and bone marrow. The sinusoids form from branches of the portal vein in the liver and from arterioles (minute arteries) in other organs. The walls of the sinusoids are lined with phagocytic cells, called Kupffer cells, that digest old red blood cells and clear the bloodstream of toxins.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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