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the retrogressive evolution of a species.
Compare anagenesis (def 1).

catagenesis cat·a·gen·e·sis (kāt’ə-jěn’ĭ-sĭs)
See involution.


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  • Catamnesis

    a medical history following the onset of an illness. catamnesis cat·am·ne·sis (kāt’ām-nē’sĭs) n. The medical history of a patient following an illness; the follow-up history. cat’am·nes’tic (-něs’tĭk) adj.

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    a wild animal of the cat family, especially the cougar or the lynx. catamountain. Historical Examples It was not until he had gone deeply into the woods, and the darkness was everywhere about him, that he remembered the catamount. The Homesteader Oscar Micheaux It was as large a catamount as the two Maine lads had […]

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