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rad 1

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

adj. Slang
Excellent; wonderful.

[Short for radical.]

rad 3



(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]


symbol for
(Units) radian



n. Physics.
a unit of absorbed dose equal to 0.01 Gy. Compare dose (def. 4).
[1915–20; shortening of radiation]



1. Informal. a radical.
2. Slang. fine; wonderful.
[1820–30; shortening of radical]




1. radical.
2. radix.


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.


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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.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
References in periodicals archive ?
It's like this school year went to waste," Jad told The Daily Star.
Ewan decided to redo the clip due to the fact that the first clip that was directed by Jad did not meet the satisfaction of Sara who wrote the song and she had felt that the story should reflect the words of the song.
Sa dalawang pagkakataon, ang pera na dinala ko kay Jaybee ay ibinigay niya kay Jad De Vera, mismo sa harapan ko (In two instances, Jaybee gave Jad De Vera the money I delivered, he did it in front of me),' he said.
Under the terms of this agreement, JAD will be able to manufacture and sell the entire portfolio of WEnrtsilEn 2-stroke engines.
Obama's statement signals a US review of relations with Egypt," Jad told Gulf News.
The agreement has been signed at a ceremony in Jingjiang City, China by Chen Guochong, Chairman of JAD and Martin Wernli, Wartsila Ship Power.
Relatives of the victims gathered at the site of the building to remember their loved ones and asked that justice be done, recalling how the Jad building suddenly became a mound of rubble and scattered body parts
The tenth anniversary of the attacks comes as the Arab nation looks a different place, pursuing a future of democracy and freedom," said Emad Jad, an expert at Al Ahram Centre for Political and Strategic Studies.
Nawal is currently filming a clip for the song "Huquqak Ayh" (What are your rights) with Lebanese director Jad Shawairi.
The Camillo Ricordi Humanitarian Award was presented to Joseph "Dee" Dussich, President/CEO of JAD Corp.
The statistics show that the poultry sector of the Dominican agricultural activity has a solid base to continue increasing its production, said o Osmar Benitez of the JAD.