Tri*no"mi*al , a. (Nat. Hist.) Consisting of, or involving the use of, three terms; as, a trinomial systematic name specifying
the genus, species, and variety.
Tri*no"mi*al , a. (Math.) Consisting of three terms; of or pertaining to trinomials; as, a trinomial root.
Tri*no"mi*al (?), n.
[Pref. tri- + -nomial as in binomial: cf. F. trinôme.]
(Math.) A quantity consisting of three terms, connected by the sign + or
-; as, x + y +
z, or ax
+ 2b - c2.
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