noun🔗ShareFlogistoThe 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. "Los químicos creían que la madera liberaba flogisto en el aire al quemarse.theorychemistrysubstancephysicsscienceenergyChat with AIVocabulary GamePractice Reading