醸じょう母ぼMeanings1nounleaven; yeastRare term for yeast or leaven; in modern Japanese, 酵母 (こうぼ) is the standard word. 醸母 may appear in older texts or specialized contexts.古ふるい文ぶん献けんでは「醸じょう母ぼ」が酵こう母ぼを指さすことがある。In old documents, 醸母 can refer to yeast.