— trinomially , adv.
/truy noh"mee euhl/ , adj.
1. Algebra. consisting of or pertaining to three terms.
2. Biol.
a. pertaining to a scientific name comprising three terms, as of genus, species, and subspecies or variety.
b. characterized by the use of such names.
n.
3. Algebra. an expression that is a sum or difference of three terms, as 3 x + 2 y + z or 3 x 3 + 2 x 2 + x.
4. Biol. a trinomial name, as Rosa gallica pumila.
[ 1665-75; TRI- + (BI)NOMIAL ]