| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024neb•u•la /ˈnɛbyələ/USA pronunciation n. [countable], pl. -lae /-ˌli, -ˌlaɪ/USA pronunciation -las. - Astronomya cloud of gas and dust in outer space between stars.
neb•u•lar, adj. WordReference Random House Unabridged Dictionary of American English © 2024neb•u•la (neb′yə lə),USA pronunciation n., pl. -lae (-lē′, -lī′),USA pronunciation -las. - Astronomy
- AstronomyAlso called diffuse nebula. a cloud of interstellar gas and dust. Cf. dark nebula, emission nebula, reflection nebula.
- (formerly) any celestial object that appears nebulous, hazy, or fuzzy, and extended in a telescope view.
- Pathology
- a faint opacity in the cornea.
- cloudiness in the urine.
- Drugsany liquid medication prepared for use as a spray.
- Latin: a mist, vapor, cloud; akin to Greek nephélē cloud, German Nebel fog, haze
- 1655–65
Collins Concise English Dictionary © HarperCollins Publishers:: nebula /ˈnɛbjʊlə/ n ( pl -lae / -ˌliː/, -las)- a diffuse cloud of particles and gases (mainly hydrogen) that is visible either as a hazy patch of light (either an emission or a reflection nebula) or an irregular dark region against a brighter background (dark nebula)
- opacity of the cornea
Etymology: 17th Century: from Latin: mist, cloud; related to Greek nephétē cloud, Old High German nebul cloud, Old Norse njól nightˈnebular adj |