ar·o·mor·pho·sis | \ˌarəˈmȯrfəsə̇s sometimes -ˌmȯrˈfō-\
plural aromorphoses\-ˌsēz \

Definition of aromorphosis 

: biological evolution marked by general increase in degree of organization without sharp specialization — compare allomorphosis

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History and Etymology for aromorphosis

New Latin, from aro- (from Greek ara, ar there and then, straightway; also, interrogative and connective particle) + morphosis; akin to Lithuanian ir̃ and, also, ar̃, interrogative particle

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