Noun intumescency has 2 senses

• intumescency(n = noun.state) intumescence - swelling up with blood or other fluids (as with congestion); Array
is a kind of lump, puffiness, swelling
has particulars: haematoma, hematoma
Derived forms verb intumesce₂, adjective intumescent₁

• intumescency(n = noun.process) intumescence, swelling - the increase in volume of certain substances when they are heated (often accompanied by release of water); Array
is a kind of chemical action, chemical change, chemical process