- intumescence, intumescency - swelling up with blood or other fluids (as with congestion)
--1 is a kind of swelling, puffiness, lump
--1 has particulars: hematoma, haematomaDerived form: verb intumesce2 - intumescence, intumescency, swelling - the swelling of certain substances when they are heated (often accompanied by release of water)
--2 is a kind of chemical process, chemical change, chemical action