As nouns the difference between terms and plesiomorph
is that terms is while plesiomorph is (taxonomy) an organism which represents a primitive state of evolution relative to another organism.
terms
English
Noun
(head)
Statistics
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plesiomorph
English
Noun
(
en noun)
(taxonomy) An organism which represents a primitive state of evolution relative to another organism.
Derived terms
*plesiomorphic
*plesiomorphy