polyphenism n. [Gr. polys, many; phaneros, visible] The occurrence in a population of several phenotypes that are not due to genetic differences between individuals; polypheny.
polyphenol layer A silver binding product exuded from the tip of the pore canals, formerly considered as a sublayer in the epicuticle.
polyphyletic a. [Gr. polys, many; phyle, tribe] 1. Of mixed evolutionary origin, not derived from a common ancestor. 2. Pertaining to a group whose most recent common ancestor is not cladistically a member of that group. 3. Pleo-phyletic. polyphyly n. see monophyletic, oligophyletic.
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