n. [ Pref. dys- + teleology. ] (Biol.) The doctrine of purposelessness; a term applied by Haeckel to that branch of physiology which treats of rudimentary organs, in view of their being useless to the life of the organism. [ 1913 Webster ]

To the doctrine of dysteleology, or the denial of final causes, a proof of the real existence of such a thing as instinct must necessarily be fatal. Word (Dynamic Sociology). [ 1913 Webster ]