noun
cinchona bark
Refers to the bark of the cinchona tree, historically used as a source of quinine. Primarily a technical or historical term.
キナ皮はマラリアの治療に使われた。
Cinchona bark was used to treat malaria.
From キナ (kina, from Spanish 'quina', ultimately from Quechua) + 皮 (hi, 'bark').