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bilinear

[bahy-lin-ee-er] /baɪˈlɪn i ər/
adjective, Mathematics
1.
of, relating to, or having reference to two lines:
bilinear coordinates.
2.
of the first degree in each of two variables, as an equation.
Origin of bilinear
1850-1855
1850-55; bi-1 + linear
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for bilinear

bilinear

/baɪˈlɪnɪə/
adjective
1.
of or referring to two lines
2.
of or relating to a function of two variables that is linear in each independently, as f(x, y) = xy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for bilinear
adj.

also bi-linear, 1851, from bi- + linear. Related: Bilinearly; bilinearity.

Online Etymology Dictionary, © 2010 Douglas Harper
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