Source : Webster's Revised Unabridged Dictionary (1913)

Gustable \Gust"a*ble\, a. [See {Gust}, v.] [Obs.]
   1. Capable of being tasted; tastable.

            This position informs us of a vulgar error, terming
            the gall bitter; whereas there is nothing gustable
            sweeter.                              --Harvey.

   2. Pleasant to the taste; toothsome; savory.

            A gustable thing, seen or smelt, excites the
            appetite, and affects the glands and parts of the
            mouth.                                --Derham.

Gustable \Gust"a*ble\, n.
   Anything that can be tasted. [Obs.]