Source : Webster's Revised Unabridged Dictionary (1913)

Tumescent \Tu*mes"cent\, a.
   Slightly tumid; swollen, as certain moss capsules.

Source : WordNet®

tumescent
     adj : abnormally distended especially by fluids or gas; "hungry
           children with bloated stomachs"; "he had a grossly
           distended stomach"; "eyes with puffed (or puffy) lids";
           "swollen hands"; "tumescent tissue"; "puffy tumid
           flesh" [syn: {bloated}, {distended}, {puffed}, {puffy},
            {swollen}, {tumid}, {turgid}]