rad

2
[ rad ]
/ ræd /

noun

Informal. radical.

adjective

Slang. fine; wonderful.

Origin of rad

2
by shortening of radical
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for raddest (1 of 2)

rad

1
/ (ræd) /

noun

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

Word Origin for rad

C20: shortened from radiation

British Dictionary definitions for raddest (2 of 2)

rad

2

symbol for

radian
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

Science definitions for raddest

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.

Culture definitions for raddest

rad


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.