ごかい 沙蚕 LinksSentence search for 沙蚕Sentence search for ごかいSentence search for 砂蚕Sentence search for ゴカイKanji details for 沙 and 蚕Edit in JMdict Noun1. ragworm; sandworm; clam worm (Hediste)Usually written using kana aloneOther forms砂蚕 【ごかい】、ゴカイNotes砂蚕: Rarely-used kanji form. Discussions Log in to talk about this word.