化学(かがく) かがく noun chemistry See also: 科学(かがく) (science (科学)) 1. chemistry The branch of science concerned with the substances of which matter is composed. 化学(かがく)実験(じっけん)をする。 To conduct a chemistry experiment. 化学(かがく)反応(はんのう)が起(お)きる。 A chemical reaction occurs. 化学(かがく)物質(ぶっしつ)を分析(ぶんせき)する。 To analyze chemical substances. 化学(かがく) is composed of 化(か) (change) + 学(がく) (study).NOTE: Has the same reading as 科学(かがく) (science). Context usually clarifies meaning. In speech, sometimes pronounced ばけがく to distinguish.BRANCHES:有機(ゆうき)化学(かがく): organic chemistry無機(むき)化学(かがく): inorganic chemistry生(せい)化学(かがく): biochemistryCOMMON COMPOUNDS:化学(かがく)式(しき): chemical formula化学(かがく)反応(はんのう): chemical reaction化学(かがく)薬品(やくひん): chemicals Related Words Contrast: 科学(かがく) (science (same reading)) Related: 物理(ぶつり) (physics) Related: 生物(せいぶつ) (biology) general Added 2026.1.16 14:20 · Revised 2026.6.6 3:06 05000/05336_kagaku_chem