polyphyletism

noun
poly·​phy·​le·​tism | \ ˌpäl-i-ˈfī-lə-ˌtiz-əm How to pronounce polyphyletism (audio) \

Medical Definition of polyphyletism

2 : derivation from more than one ancestral line

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“Polyphyletism.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/polyphyletism. Accessed 26 Sep. 2020.

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