American Heritage Dictionary
Century Dictionary
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Elsewhere on the web
It is unusually polymorphous-that is, it differs quite a bit from person to person, even within genetically similar groups.— Popular Science
He was identified with Adonis, Bacchus, Pan, Osiris and Mithra; he was made a "polymorphous"[40] being in which all celestial powers manifested themselves in turn; a pantheos who wore the crown of rays and the lunar crescent at the same time, and whose various emblems expressed an infinite multiplicity of functions When neo-Platonism was triumphing, the Phrygian fable became the traditional mould into which subtle exegetists boldly poured their philosophic speculations on the creative and stimulating forces that were the principles of all material forms, and on the deliverance of the divine soul that was submerged in the corruption of this earthly world.— The Oriental Religions in Roman Paganism
"Incest complex"--Now too the child under the influence of occasional seduction may become polymorphous-perverse, that is, may become subject to any form of sexual perversion.— Studies in Forensic Psychiatry

Century Dictionary (1)
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