noun🔗Share燃素 The hypothetical fiery principle formerly assumed to be a necessary constituent of combustible bodies and to be given up by them in burning."Chemists once believed that wood released phlogiston into the air as it burned. "化学家们一度认为木头燃烧时会向空气中释放燃素。theorychemistrysubstancephysicsscienceenergyChat with AIVocabulary GamePractice Reading
