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
ブンゼンバーナーの外炎は酸化炎として使われる。
The outer cone of a Bunsen burner is used as an oxidizing flame.
外炎の温度は内炎より高い。
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).