adjective Mathematics.
of, pertaining to, or having reference to two lines: bilinear coordinates.
of the first degree in each of two variables, as an equation.

1850–55; bi-1 + linear Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
bilinear (baɪˈlɪnɪə)
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 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
All digital rotations were done using bilinear interpolation.
Bilinear interpolation uses known values at corners of a rectangle to compute unknown values within the rectangle.
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