补体 Traditional form: 補體 Pinyin (reading): bǔtǐ Definitions: complement (in blood serum) Characters: 补 - to fix, to mend, to patch, to restore 体 - body; group, class; form, style, system Traditional characters: 補 - to fix, to mend, to patch, to restore 體 - body; group, class; form, style, system