noun
molten salt; fused salt
Technical term used in chemistry and engineering for salts that are liquid at high temperatures.
溶融塩は原子炉の冷却材として使われることがある。
Molten salt is sometimes used as a coolant in nuclear reactors.
Compound of 溶融 (yōyū, 'melting') and 塩 (en, 'salt').