恒こう温おん器きこうおんきMeanings1nounincubatorTechnical term for a device that maintains a constant temperature, especially for culturing microorganisms or hatching eggs. In everyday contexts, インキュベーター is more common.細さい菌きんの培ばい養ようには恒こう温おん器きを使つかいます。We use an incubator for culturing bacteria.