井せいTop 20000MeaningsNoun2. Chinese "Well" constellation (one of the 28 mansions)Show all meanings (1 more)Kanji used井a wellPitch accentせいUsed in vocabulary地じ熱ねつ井せいgeothermal wellNoun地ち熱ねつ井せいgeothermal wellNoun生せい産さん井せいproduction well (esp. of geothermal power)Noun