outer cone of a flame; oxidizing flame
Chemistry term for the outer, oxidizing part of a flame, contrasted with 内炎 (inner cone/reducing flame).
See also: 内炎
The outer cone of a Bunsen burner is used as an oxidizing flame.
The temperature of the outer cone is higher than that of the inner cone.
Standard kanji spelling for the outer cone of a flame.
Rarely used kanji form; 焔 is a variant of 炎.
Compound of 外 (outer) and 炎 (flame).