sinusoid

[sahy-nuh-soid]
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

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World English Dictionary
sinusoid (ˈsaɪnəˌsɔɪd)
 
n
1.  any of the irregular terminal blood vessels that replace capillaries in certain organs, such as the liver, heart, spleen, and pancreas
2.  another name for sine curve
 
adj
3.  resembling a sinus
 
[C19: from French sinusoïde. See sinus, -oid]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
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 Britannica
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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Example sentences
In this experiment, a sinusoid is fed into the oscilloscope.
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