rad
1a unit of absorbed dose of radiation equal to 0.01 gray: not a standard SI unit, the rad is still used, especially in the U.S., but it is increasingly disfavored.
Origin of rad
1Other definitions for rad (2 of 4)
Informal. a radical, especially a person with extreme views on political and social issues.
Slang. excellent; wonderful; cool: a high speed, high energy, totally rad racing game.
Origin of rad
2Other definitions for rad (3 of 4)
Origin of rad
3Other definitions for rad. (4 of 4)
radical.
radix.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use rad in a sentence
I'd radder go to hell on my knees backward dan tech de fust drap ob dat.
Si Klegg, Book 4 (of 6) | John McElroyI'd radder take dis mutt into Fairview dan pull down a t'ousan' in de long green.
Motor Matt's Red Flyer, or, On the High Gear | Stanley R. Matthews"I'd a heap sight radder hab soffin' t' eat," said Washington, when it was made known that they were to retire.
Through Space to Mars | Roy RockwoodI ast seberal colored men, but dey'd radder whitewash an' clean chicken coops.
Tom Swift and his Motor-cycle | Victor AppletonBeoples might radder haf deir landts for nuttin', dan bay rents for dem.
The Redskins; or, Indian and Injin, Volume 1. | James Fenimore Cooper
British Dictionary definitions for rad (1 of 3)
/ (ræd) /
a 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
Origin of rad
1British Dictionary definitions for rad (2 of 3)
radian
British Dictionary definitions for rad. (3 of 3)
radical
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
Scientific definitions for rad
[ 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.
Cultural definitions for rad
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.
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