A hill or vent that emits smoke, flame, or gases, but not lava (e.g. above a coal mine that has accidentally caught fire).
Late 18th century; earliest use found in Richard Kirwan (1733–1812), chemist and mineralogist.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。