反応

Etymology
in his work 生物学語彙 (Seibutsugaku goi, “A biological vocabulary in English, Latin and Japanese”) as a translation of.

Noun

 * 1) chemical reaction
 * 2) reaction, response
 * 3) feedback

Verb

 * 1) to react chemically
 * 2) to respond, to react
 * 3) be responsive, be sensitive