名詞 phlogiston:

1. a hypothetical substance once believed to be present in all combustible materials and to be released during burning

phlo.gis.ton

n.（名詞）
A hypothetical substance formerly thought to be a volatile constituent of all combustible substances released as flame in combustion.
燃素，熱素：原來假設的在所有燃燒物質中揮發(fā)性的一種物質成分，在燃燒中作為火焰而被釋放出來

來源：
From Greek [neuter of] phlogistos [inflammable]
源自 希臘語 [] phlogistos的中性 [易燃的]
from phlogizein [to set on fire]
源自 phlogizein [點火]
from phlox phlog- [flame] * see bhel-
源自 phlox phlog- [火焰] *參見 bhel-