Definition of: trimorphism

(trī·môr′fiz·əm) noun
1. Bot. The existence on the same plant of three distinct forms of flowers as regards the relative lengths of stamens and pistils.
2. Mineral. The property of crystallizing in three series of fundamentally different forms with the same ultimate chemical composition.
3. Zool. Difference of species in form, color, etc., characterizing three distinct types.
—tri·mor′phic, tri·mor′phous adjective