胚乳 Traditional form: 胚乳 Pinyin (reading): pēirǔ Definitions: endosperm (botany) Characters: 胚 - embryo; an unfinished thing 乳 - breast, nipples; milk; to suckle Traditional characters: 胚 - embryo; an unfinished thing 乳 - breast, nipples; milk; to suckle