Prelibation

noun

1. A foretaste.
2. The act of tasting beforehand or by anticipation; a foretaste.
3. A previous libation; an offering made beforehand, as if in libation.
4. A tasting beforehand, or by anticipation; a foretaste.

   "a prelibation of heavenly bliss"

5. A pouring out, or libation, before tasting.