The Collaborative International Dictionary
Aphlogistic
Aphlogistic \Aph`lo*gis"tic\, a. [Gr. ? not inflammable; 'a priv. + ? set on fire. See Phlogiston.] Flameless; as, an aphlogistic lamp, in which a coil of wire is kept in a state of continued ignition by alcohol, without flame. [1913 Webster] ||
Wiktionary
aphlogistic
a. (context archaic English) flameless
Usage examples of "aphlogistic".
I finally figured out that it was from aphlogistic, a word derived from Greek meaning "a lamp giving light without flame.