氧乙炔 yǎngyǐquē oxyacetylene Origin Definitions Defs Strokes Stroke Words Sentences Sents 氧 yǎng noun oxygen oxygen; a colorless, odorless gas necessary for life and combustion乙炔 yǐquē acetylene A colorless, flammable gas used as a fuel for welding and lighting, or as a chemical building block; also called 电石气 diànshíqì.