さんかくがい 三角貝 LinksSentence search for 三角貝Sentence search for さんかくがいSentence search for サンカクガイKanji details for 三, 角 and 貝Edit in JMdict Noun1. trigoniid (any clam of family Trigoniidae)Usually written using kana aloneOther formsサンカクガイ Discussions Log in to talk about this word.