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Definition of Monophyletic
1. a. Of or pertaining to a single family or stock, or to development from a single common parent form; -- opposed to polyphyletic; as, monophyletic origin.
Definition of Monophyletic
1. [adj]
Medical Definition of Monophyletic
1. Derived from a single ancestral line. Compare: polyphyletic. (09 Oct 1997)