abstinent

adjective1

1. •
   Refraining from indulgence, especially from the indulgence of appetite.

   • Be abstinent; shew not the corruption of thy generation: he that feeds shall die — 1612

noun1

1. •
   One who abstains; a faster.

noun1

1. •
   (historical) One of a Christian sect that appeared in France and Spain in the 3rd century, and practised abstinence from meat and sex.