noun
hot salt water
Refers to heated water with salt dissolved in it, often for therapeutic or culinary use.
喉が痛いときは、塩湯でうがいをするとよい。
When you have a sore throat, gargling with hot salt water is good.
noun
saltwater bath
A bath with salt added to the water, similar to 塩風呂. Often found at hot spring resorts or for health purposes.
See also: 塩風呂
旅館の大浴場には塩湯がある。
The inn's large public bath has a saltwater bath.
塩風呂 is a more common term for a salt bath, while 塩湯 can also refer simply to hot salt water for gargling or cooking.
Compound of 塩 (salt) and 湯 (hot water). The reading しおゆ is a straightforward kun'yomi combination.