noun
resolvent; dissolvent
Rare technical term in chemistry for a substance that dissolves or breaks down another substance.
解凝剤は化学反応で沈殿物を溶かすために使われる。
A resolvent is used to dissolve precipitates in chemical reactions.
Compound of 解 (kai, 'dissolve') + 凝 (gyō, 'coagulate') + 剤 (zai, 'agent'). The exact derivation is uncertain; it is a technical coinage in chemistry.