tri-, tre-

(Greek > Latin: a numerical prefix meaning, three, thrice, threefold)

trixenous, trixeny
1. A reference to a parasite utilizing three host species during its life cycle.
2. A mixed culture of organisms, where one organism is associasted with three other species.
trizonal
Having, or arranged in, three zones or layers.

Cross references of word families that are related, partially or totally, to: "three, third": terce-; terti-; trigono-; trito-.