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Webster's 1913 Dictionary

POLYPHYLETIC

Pol `y *phy *let "ic, a. Etym: [Poly- + Gr. (Biol.)

Defn: Pertaining to, or characterized by, descent from more than one root form, or from many different root forms; polygenetic; -- opposed to Ant: monophyletic.

New American Oxford Dictionary

polyphyletic

pol y phy let ic |ˌpälifīˈletik ˌpɑlifaɪˈlɛtɪk | ▶adjective Biology (of a group of organisms ) derived from more than one common evolutionary ancestor or ancestral group and therefore not suitable for placing in the same taxon.

Oxford Dictionary

polyphyletic

polyphyletic |ˌpɒlɪfʌɪˈlɛtɪk | ▶adjective Biology (of a group of organisms ) derived from more than one common evolutionary ancestor or ancestral group and therefore not suitable for placing in the same taxon.