Source : Webster's Revised Unabridged Dictionary (1913)

Postprandial \Post*pran"di*al\, a. [Pref. post- + prandial.]
   Happening, or done, after dinner; after-dinner; as,
   postprandial speeches.

Source : WordNet®

postprandial
     adj : following a meal (especially dinner); "his postprandial
           cigar"; "took a postprandial walk" [ant: {preprandial}]