evolutionary fitness

ev·o·lu·tion·ar·y fit·ness

the probability that the line of descent from an individual with a specific trait will not eventually die out.

ev·o·lu·tion·ar·y fit·ness

(ev'ŏ-lū'shŭn-ar-ē fit'nĕs) The probability that the line of descent from an individual with a specific trait will not eventually die out.