分ぶん子し雲うんぶんしうんMeanings1nounmolecular cloudastronomyTechnical term in astronomy for a dense interstellar cloud where molecules, especially H₂, can form.オリオン座ざには巨きょ大だいな分ぶん子し雲うんが広ひろがっている。A giant molecular cloud spreads across the constellation Orion.
