flotation method; flotation
Technical term used in fields such as mineral processing, wastewater treatment, and archaeology to separate materials based on buoyancy.
The flotation method is widely used for mineral separation.
In archaeology, the flotation method is used to recover seeds and charcoal from soil.
Compound of 浮遊 (ふゆう, 'floating') and 法 (ほう, 'method'). The exact historical derivation is uncertain, but the term is a straightforward technical coinage.