INTUMESCENT
puffy, intumescent, tumescent, tumid, turgid
(adjective) 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”
Source: WordNet® 3.1
Etymology
Adjective
intumescent (comparative more intumescent, superlative most intumescent)
That becomes swollen, especially upon exposure to heat
Noun
intumescent (plural intumescents)
Any substance that swells on exposure to heat, thus increasing in volume and decreasing in density.
Source: Wiktionary
In`tu*mes"cent, a. Etym: [L. intumescens, p. pr.]
Definition: Swelling up; expanding.
Source: Webster’s Unabridged Dictionary 1913 Edition