幾何級数 きかきゅうすう Meanings Noun geometric series Kanji 幾 how many. Read as キ. 何 what 級 grade. Read as キュウ. 数 number. Read as スウ. Words containing 幾何級数 幾何級数的 (きかきゅうすうてき) geometric (progression, etc.) Word lists Mathematics Jinuma: Japanese Dictionary · Word lists