JapaneseEdit

Kanji in this term
あん
Grade: 3
こく
Grade: 2
せい
Grade: 2
うん
Grade: 2
on'yomi

EtymologyEdit

Compound of 暗黒(ankoku, darkness) and 星雲(seiun, nebula).

NounEdit

暗黒星雲 ‎(hiragana あんこくせいうん, romaji ankoku seiun)

  1. a type of interstellar cloud that is so dense that it obscures light from background stars; a dark nebula