精せい油ゆ

noun

essential oil; volatile oil

Commonly used in aromatherapy, cosmetics, and natural products. Refers to concentrated plant extracts.

• ラベンダーの精せい油ゆをアロマディフューザーに入いれる。

  I put lavender essential oil into the aroma diffuser.

noun

refined oil

A broader term for any oil that has been purified or processed. Less common than the essential oil sense.

• この工こう場じょうでは原げん油ゆから精せい油ゆを生せい産さんしている。

  This factory produces refined oil from crude oil.