[mak-roh-ev-uh-loo-shuh n or, esp. British, -ee-vuh-] /ˌmæk roʊˌɛv əˈlu ʃən or, esp. British, -ˌi və-/

noun, Biology.
major evolutionary transition from one type of organism to another occurring at the level of the species and higher taxa.
(biology) the evolution of large taxonomic groups such as genera and families
Evolution that results in the formation of a new taxonomic group above the level of a species.


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