Technical term in chemistry and water treatment; refers to the process of forcing a solvent through a semipermeable membrane against the natural osmotic gradient.
Seawater is desalinated using a reverse osmosis membrane.
この浄水器は逆浸透方式を採用している。
This water purifier uses a reverse osmosis system.
Compound of 逆 (reverse) and 浸透 (osmosis), a calque of English 'reverse osmosis'.