矽铝层 xīlǚcéng sial Origin Definitions Defs Strokes Stroke Words Sentences Sents 矽 xì silicon silicon; chemical element with atomic number 14; term used primarily in Taiwan or as an older name in Mainland China for 硅 guī铝 鋁 lǚ noun aluminum aluminum; chemical element with symbol Al and atomic number 13层 層 céng noun layer A physical sheet, thickness of material, or stratum covering a surface