Science. Relating to or involving the observational or experimental investigation of the individual effects of several causative factors (factor, n.…

Involving or dependent on a number of factors or causes. Cf. multifactorial, adj.

Originally: controlled by or involving more than one gene, polygenic (cf. factor, n. 8b) (now rare). Later: involving or dependent on a number of…

of, relating to, or designating a plasmagene.