trinomial

 
Pronunciation: /trʌɪˈnəʊmɪəl/

adjective

  • 1(of an algebraic expression) consisting of three terms.
  • 2 Biology (of a taxonomic name) consisting of three terms where the first is the name of the genus, the second that of the species, and the third that of the subspecies or variety.

noun

  • 1an algebraic expression of three terms.
  • 2 Biology a trinomial taxonomic name.

Origin:

late 17th century: from tri- 'three', on the pattern of binomial