- (context, chemistry, historical) The hypothetical fiery principle formerly assumed to be a necessary constituent of combustible bodies and to be given up by them in burning.
Etymology: Coined by w:Georg Ernst Stahl, Stahl in 1702, from Ancient Greek (polytonic, ), neuter of (polytonic, ) "inflammable", from (polytonic, ) "to set fire to", from (polytonic, ) "flame".
- Dutch: phlogiston
- German: Phlogiston, Caloricum
- Italian: flogisto
- Spanish: flogisto
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