桑くわ子こalso: くわごFreq.FrequencyTop 100,000Meanings1nounsilkworm (Bombyx mori)archaicArchaic term for silkworm; modern Japanese uses 蚕 (かいこ). The cross-reference to 蚕 confirms this is an older synonym.See also: 蚕昔むかしの文ぶん献けんには「桑くわ子こ」と書かいて「くわこ」と読よませる例れいがある。In old documents, there are examples where 桑子 is written and read as くわこ.