# rad

(redirected from*Radiation Absorbed Dose*)

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## 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

## rad^{1}

(ræd) *n.*

*Physics.*

a unit of absorbed dose equal to 0.01 Gy. Compare dose (def. 4).

[1915–20; shortening of radiation]

## rad^{2}

(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.

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 materialradioactivity 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 |

Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

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