单词 | nebula |
释义 | nebula[ neb-yuh-luh ] / ˈnɛb yə lə / SEE SYNONYMS FOR nebula ON THESAURUS.COM noun, plural neb·u·lae [neb-yuh-lee, -lahy], /ˈnɛb yəˌli, -ˌlaɪ/, neb·u·las.Astronomy.
Pathology.
any liquid medication prepared for use as a spray. Origin of nebula1655–65; <Latin: a mist, vapor, cloud; akin to Greek nephélē cloud, German Nebel fog, haze OTHER WORDS FROM nebulaneb·u·lar, adjectivenon·neb·u·lar, adjectivepre·neb·u·lar, adjectiveWords nearby nebulaNebr., Nebraska, Nebraskan, nebris, Nebuchadnezzar, nebula, nebular hypothesis, nebulated, nebulium, nebulize, nebulizer Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for nebulaBritish Dictionary definitions for nebulanebula / (ˈnɛbjʊlə) / noun plural -lae (-ˌliː) or -lasastronomy 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)Compare planetary nebula pathol
any substance for use in an atomizer spray Derived forms of nebulanebular, adjectiveWord Origin for nebulaC17: from Latin: mist, cloud; related to Greek nephétē cloud, Old High German nebul cloud, Old Norse njól night Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for nebulanebula [ (neb-yuh-luh) ] plur. nebulae In astronomy, a hazy patch of light visible in the sky. Some nebulae are clouds of gas within the Milky Way; others are distant galaxies. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for nebulanebula [ nĕb′yə-lə ] n. pl. neb•u•lasA faint, foglike opacity of the cornea. A class of oily preparations for use in a nebulizer. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for nebulanebula [ nĕb′yə-lə ] Plural nebulae (nĕb′yə-lē′) nebulasA visible, thinly spread cloud of interstellar gas and dust. Some nebulae are the remnants of a supernova explosion, others are gravity-induced condensations of the gases in the interstellar medium which in certain cases may become a site for the formation of new stars. The term was formerly used of any hazy, seemingly cloudlike object, including what are now recognized as other galaxies beyond the Milky Way; it is restricted now to actual clouds of gas and dust within our own galaxy.♦ Nebulae are generally classified as bright or dark. Among the bright nebulae are cold clouds that reflect light from nearby stars (reflection nebulae) and hot, ionized clouds that glow with their own light (emission nebulae). Dark nebulae-cold clouds that absorb the passing light from background stars-are called absorption nebulae. See more at star. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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