| 单词 | rad |
| 释义 | rad1[ rad ] / ræd / SEE SYNONYMS FOR rad ON THESAURUS.COM noun Physics.a unit of absorbed dose of radiation equal to 0.01 gray2: not a standard SI unit, the rad is still used, especially in the U.S., but it is increasingly disfavored. Origin of rad1First recorded in 1915–20; r(adiation) a(bsorbed) d(ose) Definition for rad (2 of 4)rad2 [ rad ] / ræd / nounInformal. a radical, especially a person with extreme views on political and social issues. adjective, rad·der, rad·dest.Slang. excellent; wonderful; cool: a high speed, high energy, totally rad racing game. Origin of rad2First recorded in 1820–25 for 1; 1975–80 for 2; shortening of radical Definition for rad (3 of 4)rad3 [ rad ] / ræd / abbreviation Mathematics.radian; radians. Origin of rad3First recorded in 1910–15; shortening Definition for rad (4 of 4)rad. abbreviation Mathematics.radical. radix. Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for rad (1 of 3)rad1 / (ræd) / nouna former unit of absorbed ionizing radiation dose equivalent to an energy absorption per unit mass of 0.01 joule per kilogram of irradiated material. 1 rad is equivalent to 0.01 gray Word Origin for radC20: shortened from radiation British Dictionary definitions for rad (2 of 3)rad2 symbol forradian British Dictionary definitions for rad (3 of 3)rad. abbreviation forradical radius 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 radrad An acronym for radiation absorbed dose. A unit of energy absorbed from ionizing radiation. 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 rad (1 of 2)rad 11 [ răd ] n.A unit of energy absorbed from ionizing radiation, equal to 100 ergs per gram or 0.01 joule per kilogram of irradiated material. Medical definitions for rad (2 of 2)rad 22 abbr.radian The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for radrad [ răd ] A unit used to measure energy absorbed by a material from radiation. One rad is equal to 100 ergs per gram of material. Many scientists now measure this energy in grays rather than in rads. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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