01 a. Deviating from the normal, perfect, or mature form; having different forms at different stages of existence, or in different individuals of…
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Deviating from the normal, perfect, or mature form; having different forms at different stages of existence, or in different individuals of the same species; -- applied especially to insects in which there is a wide difference of form between the larva and the adult, and to plants having more than one form of flower.(Biol.)