Prescriptive
Pronunciation : Pre*scrip"tive
Part of Speech : a.
Etymology : [L. praescriptivus of a demurrer or legal exception.] (Law)
Definition : Defn: Consisting in, or acquired by, immemorial or long-continued use and enjoyment; as, a prescriptive right of title; pleading the continuance and authority of long custom. The right to be drowsy in protracted toil has become prescriptive. J. M. Mason.
Source : Webster's Unabridged Dictionary, 1913