phlogiston

Noun

a hypothetical substance once believed to be present in all combustible materials and to be released during burning
The hypothetical fiery principle formerly assumed to be a necessary constituent of combustible bodies and to be given up by them in burning.

Origin / Etymology

From New Latin phlogiston, coined by Georg Ernst Stahl in 1702, from Ancient Greek φλογιστόν (phlogistón), neuter of φλογιστός (phlogistós, “burnt up, inflammable”), from φλογίζω (phlogízō, “to set fire to”), from φλόξ (phlóx, “flame”).

Scrabble Score: 16

phlogiston: valid Scrabble (US) TWL Word
phlogiston: valid Scrabble Word in Merriam-Webster MW Dictionary
phlogiston: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 19

phlogiston: valid Words With Friends Word