Meaning of TRINOMIAL in English

TRINOMIAL

n.

Pronunciation: tr ī - ' n ō -m ē - ə l

Function: noun

Etymology: tri- + -nomial (as in binomial )

Date: 1674

1 : a polynomial of three terms

2 : a biological taxonomic name of three terms of which the first designates the genus, the second the species, and the third the subspecies or variety

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.