evolution
A B C D E F G H I J K L M N O P Q R S T U V W X Z

the total of changes in the characteristics of organisms or populations, cumulated from generation to generation; the gradual development of organisms from pre-existing organisms since the beginning of life. Evolution produced all presently existing life-forms by descent with modification from previously existing forms. This is achieved by the way of natural selection of the best adapted, and therefore more highly reproductive individuals.

Alternative form for evolution : evolutionary.