adaptationism
Concise Oxford English Dictionary © 2008 Oxford University Press:
adaptationism/adəpˈteɪʃ(ə)nɪz(ə)m/
▶noun Biology the axiom or assumption that each feature of an organism is the result of evolutionary adaptation for a particular function.
– derivatives
adaptationist noun & adjective.
adaptationist noun & adjective.
'adaptationism' also found in these Oxford entries:

