外胚層 Save Sign in to save words Simplified: 外胚层 wàipēicéng ㄨㄞˋ ㄆㄟ ㄘㄥˊ ectoderm (cell lineage in embryology) Character by character 外(wài)outside 胚(pēi)embryo 層(céng)pile on top of one another A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0