長周期彗星 ちょうしゅうきすいせい Meanings Noun long-period comet Kanji 長 long. Read as チョウ. 周 around. Read as シュウ. 期 period 彗 comet; broom. Read as スイ. 星 star. Read as セイ. Word lists Astronomy Jinuma: Japanese Dictionary · Word lists