Meaning of TRINOMIAL in English

TRINOMIAL

[ trʌɪ'nəʊmɪəl ]

■ 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 a ~ expression or taxonomic name.

Origin

C17: from tri- , on the pattern of binomial .

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.