乙炔 yǐquē acetylene Origin Definitions Defs Strokes Stroke Words Sentences Sents 乙 yǐ noun ethyl (bound form) Used in chemistry to refer to the ethyl group.炔 quē alkyne (bound form) alkyne; any member of a group of organic compounds characterized by a carbon-carbon triple bond, such as 乙炔 yǐquē