trinomial
Americanadjective
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Algebra. consisting of or pertaining to three terms.
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Biology.
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pertaining to a scientific name comprising three terms, as of genus, species, and subspecies or variety.
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characterized by the use of such names.
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noun
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Algebra. an expression that is a sum or difference of three terms, as 3 x + 2 y + z or 3 x 3 + 2 x 2 + x.
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Biology. a trinomial name, as Rosa gallica pumila.
adjective
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maths consisting of or relating to three terms
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biology denoting or relating to the three-part name of an organism that incorporates its genus, species, and subspecies
noun
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maths a polynomial consisting of three terms, such as ax ² + bx + c
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biology the third word in the trinomial name of an organism, which distinguishes between subspecies
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A mathematical expression that is the sum of three monomials, such as ax 2 + bx − c.
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A taxonomic designation indicating genus, species, and subspecies or variety, as in Brassica oleracea botrytis, the cauliflower.
Other Word Forms
Etymology
Origin of trinomial
First recorded in 1665–75; tri- + (bi)nomial
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Genus is the first word of the trinomial name and a subdivision of a larger plant family; some have only a single kind of plant, such as Ginkgo, while others, like Rosa, contain hundreds.
From Seattle Times ● Mar. 25, 2023
In the first example, all terms in the trinomial were positive.
From Textbooks ● May 6, 2020
Now, what if the last term in the trinomial is negative?
From Textbooks ● May 6, 2020
Sometimes, after you factor the GCF, the leading coefficient of the trinomial becomes 1 and you can factor it by the methods we’ve used so far.
From Textbooks ● May 6, 2020
Case V. A trinomial of the form Three terms.
From A Review of Algebra by Romeyn Henry Rivenburg
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
