Tri*no"mi*al (?), n. [Pref. tri- + -nomial as in binomial: cf. F. trinome.] (Math.)
A quantity consisting of three terms, connected by the sign + or -; as, x + y + z, or ax + 2b - c2.
© Webster 1913
Tri*no"mi*al, a. (Math.)
Consisting of three terms; of or pertaining to trinomials; as, a trinomial root.
© Webster 1913
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.
© Webster 1913