rad
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Related to Rads: Reactive attachment disorder, Reactive Airways Dysfunction Syndrome, Reactive airway disease, TADS
rad 1
(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. It has been replaced as a standard scientific unit by the gray.
[r(adiation) a(bsorbed) d(ose).]
rad 2
(răd)adj. Slang
Excellent; wonderful.
[Short for radical.]
rad 3
abbr.
radian
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
rad
(ræd)n
(Units) 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
[C20: shortened from radiation]
rad
symbol for
(Units) radian
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
rad1
(ræd)n. Physics.
a unit of absorbed dose equal to 0.01 Gy. Compare dose (def. 4).
[1915–20; shortening of radiation]
rad2
(ræd)n.
1. Informal. a radical.
adj. 2. Slang. fine; wonderful.
[1820–30; shortening of radical]
rad
Math.
radian.
rad.
Math.
1. radical.
2. radix.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
rad
1. A unit of radiation absorbed from a radioactive source.
2. A short form of radian, a unit of measure for plane angles. See centrad.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
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| Noun | 1. | rad - a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material radioactivity unit - a measure of radioactivity |
| 2. | rad - the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees) angular unit - a unit of measurement for angles milliradian - a unit of angular distance equal to one thousandth of a radian |
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