むかしごかい 昔沙蚕 LinksSentence search for 昔沙蚕Sentence search for むかしごかいSentence search for ムカシゴカイKanji details for 昔, 沙 and 蚕Edit in JMdict Noun1. archiannelids of the genus Saccocirrus (esp. Saccocirrus major)Usually written using kana aloneOther formsムカシゴカイ Discussions Log in to talk about this word.