noun
A device or apparatus that separates components of a mixture, such as liquids from solids or different liquids. Common in industrial, chemical, and kitchen contexts.
この分離器は油と水を分けるのに使われる。
This separator is used to separate oil and water.
遠心分離器で血液成分を分離する。
Blood components are separated with a centrifuge.
Compound of 分離 (separation) + 器 (container/device) or 機 (machine). The exact historical derivation is uncertain, but the word follows a common pattern for naming technical equipment.