Unscramble

m 3 a 1 c 3 r 1 o 1 e 1 v 4 o 1 l 1 u 1 t 1 i 1 o 1 n 1 s 1

15 letters · 22 points in Scrabble

Meaning

noun evolution on a large scale extending over geologic era and resulting in the formation of new taxonomic groups

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