Definition of "sinusoid" []

• Mathematics See sine curve. (noun)
• Anatomy Any of the venous cavities through which blood passes in various glands and organs, such as the adrenal gland and the liver. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The reason that the sinusoid is optional is that sometimes without the sinusoid, the estimated lines end up with a wavy component."
• "The complex representation of a sinusoid is a*exp(j*2*pi*f*t) = a*exp(j*omega*t), and the frequency itself is f (in Hz) or omega (rad/s), which is real by definition (f=c/lambda, both of which are real numbers)."
• "The "sinusoid" form in the autocorrelation is quite common in CRU data many other gridcells are stronger and suggests to me that the normalization has not been performed very accurately."