单词 | cracking |
释义 | cracking[ krak-ing ] / ˈkræk ɪŋ / SEE SYNONYMS FOR cracking ON THESAURUS.COM noun(in the distillation of petroleum or the like) the process of breaking down certain hydrocarbons into simpler ones of lower boiling points by means of excess heat, distillation under pressure, etc., in order to give a greater yield of low-boiling products than could be obtained by simple distillation.Compare catalytic cracking. adverbextremely; unusually: We saw a cracking good match at the stadium. adjective Informal.done with precision; smart: A cracking salute from the honor guard. Idioms for crackingget cracking. crack (def. 54). Origin of crackingMiddle English word dating back to 1250–1300; see origin at crack, -ing1, -ing2 Words nearby crackingCracker State, cracket, crackhead, crackhouse, crackie, cracking, crackjaw, crackle, crackleware, crackling, crackly Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for crackingBritish Dictionary definitions for crackingcracking / (ˈkrækɪŋ) / adjective(prenominal) informal fast; vigorous (esp in the phrase a cracking pace) get cracking informal to start doing something quickly or do something with increased speed adverb, adjectiveBritish informal first-class; excellenta cracking good match nounthe process in which molecules are cracked, esp the oil-refining process in which heavy oils are broken down into hydrocarbons of lower molecular weight by heat or catalysisSee also catalytic cracker 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 Scientific definitions for crackingcracking [ krăk′ĭng ] The process of breaking down complex chemical compounds by heating them. Sometimes a catalyst is added to lower the amount of heat needed for the reaction. Cracking is used especially for breaking petroleum molecules into shorter molecules and to extract low-boiling fractions, such as gasoline, from petroleum. See also hydrocracking. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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