释义 |
neb·ulaBrE /ˈnebjələ/ NAmE /ˈnebjələ/ noun (plural nebu·laeBrE /ˈnebjəliː/ NAmE /ˈnebjəliː/ ) (astronomy天文学) a mass of dust or gas that can be seen in the night sky , often appearing very bright ; a bright area in the night sky caused by a large cloud of stars that are far away 星云;外观似星云的星系 |