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trinomial

[ trahy-noh-mee-uhl ]

adjective

  1. Algebra. consisting of or pertaining to three terms.
  2. Biology.
    1. pertaining to a scientific name comprising three terms, as of genus, species, and subspecies or variety.
    2. characterized by the use of such names.


noun

  1. 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.
  2. Biology. a trinomial name, as Rosa gallica pumila.

trinomial

/ traɪˈnəʊmɪəl /

adjective

  1. maths consisting of or relating to three terms
  2. biology denoting or relating to the three-part name of an organism that incorporates its genus, species, and subspecies
“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


noun

  1. maths a polynomial consisting of three terms, such as ax ² + bx + c
  2. biology the third word in the trinomial name of an organism, which distinguishes between subspecies
“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

trinomial

/ trī-nōmē-əl /

  1. A mathematical expression that is the sum of three monomials, such as ax 2 + bx c.
  2. A taxonomic designation indicating genus, species, and subspecies or variety, as in Brassica oleracea botrytis, the cauliflower.


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Derived Forms

  • triˈnomially, adverb
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Other Words From

  • tri·nomi·al·ly adverb
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Word History and Origins

Origin of trinomial1

First recorded in 1665–75; tri- + (bi)nomial
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Word History and Origins

Origin of trinomial1

C18: tri- + -nomial on the model of binomial
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Example Sentences

The trinomial is used whenever subspecific identities could be made with a reasonable degree of certainty.

Duellman used the trinomial for this population and named a new subspecies, pallidus, from Nayarit.

I have sometimes loosely speculated on what nomenclature would come to, and concluded that it would be trinomial.

A trinomial in algebra is a quantity consisting of three terms.

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trinodaltrinucleotide