Source : Webster's Revised Unabridged Dictionary (1913)

Potable \Po"ta*ble\, a. [F., fr. L. potabilis, fr. potare to
   drink; akin to Gr. po`tos a drinking, po`sis a drink, Skr.
   p[=a] to drink, OIr. ibim I drink. Cf. {Poison}, {Bib},
   {Imbibe}.]
   Fit to be drunk; drinkable. ``Water fresh and potable.''
   --Bacon. -- n. A potable liquid; a beverage. ``Useful in
   potables.'' --J. Philips.

Source : WordNet®

potable
     adj : of alcoholic beverages that are suitable for drinking; "it's
           an impudent young wine but I think you will find it
           quite potable"
     n : any liquid suitable for drinking; "may I take your beverage
         order?" [syn: {beverage}, {drink}, {drinkable}]