くがいそう 九蓋草 LinksSentence search for 九蓋草Sentence search for くがいそうSentence search for クガイソウKanji details for 九, 蓋 and 草Edit in JMdict Noun1. Veronicastrum sibiricum (species of flowering plant)Usually written using kana aloneOther formsクガイソウ Discussions Log in to talk about this word.