单词 | asthma |
释义 | asthma[ az-muh, as- ] / ˈæz mə, ˈæs- / nounPathology. a paroxysmal, often allergic disorder of respiration, characterized by bronchospasm, wheezing, and difficulty in expiration, often accompanied by coughing and a feeling of constriction in the chest. Also called bronchial asthma. Origin of asthma1350–1400; Middle English <Greek: a panting (akin to aázein to breathe hard); replacing Middle English asma<Medieval Latin <Greek ásthma Words nearby asthmaasthenia, asthenic, asthenopia, asthenospermia, asthenosphere, asthma, asthmatic, as though, Asti, astigmatic, astigmatic lens Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for asthmaBritish Dictionary definitions for asthmaasthma / (ˈæsmə) / nouna respiratory disorder, often of allergic origin, characterized by difficulty in breathing, wheezing, and a sense of constriction in the chest Word Origin for asthmaC14: from Greek: laborious breathing, from azein to breathe hard 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 asthmaasthma [ (az-muh) ] A chronic disease of the respiratory system, characterized by sudden, recurring attacks of difficult breathing, wheezing, and coughing. During an attack, the bronchial tubes go into spasms, becoming narrower and less able to move air into the lungs. Various substances to which the sufferer has an allergy, such as animal hair, dust, pollen, or certain foods, can trigger an attack. 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 asthmaasthma [ ăz′mə, ăs′- ] n.Bronchial asthma. Other words from asthmaasth•mat′ic (-măt′ĭk) adj. n.The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for asthmaasthma [ ăz′mə ] A common inflammatory disease of the lungs characterized by episodic airway obstruction caused by extensive narrowing of the bronchi and bronchioles. The narrowing is caused by spasm of smooth muscle, edema of the mucosa, and the presence of mucus in the airway resulting from an immunologic reaction that can be induced by allergies, irritants, infection, stress, and other factors in a genetically predisposed individual. Common symptoms of asthma include wheezing, coughing, and shortness of breath. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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