Etymology
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covariance 

in mathematics, "property of being covariant," 1856, from covariant (1850), from co- + variant.

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trinomial (adj.)
1670s, "having three names," from tri- + second element from binomial. In mathematics, "consisting of three terms" (1704).
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coordinal (adj.)

also co-ordinal, 1849, in mathematics and geometry, "having (a certain number) of coordinates;" see co- + ordinal.

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isometry (n.)
in mathematics, 1941, probably from isometric (q.v.) on the model of geometry/geometric.
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sinusoid 
1823 in mathematics; 1900 in physiology, from sinus + -oid. Related: Sinusoidal.
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exponential (adj.)

"of or pertaining to an exponent or exponents, involving variable exponents," 1704, from exponent + -ial. As a noun in mathematics from 1784. Related: Exponentially.

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innumerate (adj.)
"unacquainted with the basic principles of mathematics," 1959, based on illiterate, with Latin numerus "a number" (see number (n.)). Related: Innumeracy.
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emanant (n.)
1852, in mathematics, from Latin emanantem (nominative emanans), present participle of emanare (see emanate).
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multidimensional (adj.)

also multi-dimensional, 1884, in mathematics, "of more than three dimensions," from multi- "many" + dimension + -al (1). Related: Multidimensionality.

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evaluate (v.)
1831, back-formation from evaluation, or else from French évaluer, back-formation from évaluation. Originally in mathematics. Related: Evaluated; evaluating.
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