惑星系 わくせいけい Meanings Noun planetary system; star system See also: 恒星系 (こうせいけい). Kanji 惑 bewilder. Read as ワク. 星 star. Read as セイ. 系 system. Read as ケイ. Words containing 惑星系 原始惑星系円盤 (げんしわくせいけいえんばん) protoplanetary disk Jinuma: Japanese Dictionary · Word lists