Naturalistic a. : Belonging to the doctrines of naturalism.

Naturalistic a. : Closely resembling nature; realistic.

Example:
What's the difference between Naturalistic and realistic?

Taxonomy
naturalistic fallacy, fallacy, pleasure, ethics, G. E. Moore, Principia Ethica, claim, indefinable, theories, happiness, behaviour, free encyclopedia, is-ought problem, philosophers, Evolutionary Psychology, Appeal to nature, natural object, goodness.

Defination from the web:
naturalistic fallacy was committed whenever a philosopher attempts to prove a claim about ethics by appealing to a definition ... Alternatively, the phrase "naturalistic fallacy" is used to refer to the claim that what is natural is inherently good or right, and that what is ...