Definitions
1.nounA non-SI unit of absorbed dose of radiation, equal to 0.01 gray.
2.nounIn the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad
3.nounAnything which radiates or emits rays.
4.nounA device that lowers engine coolant temperature by conducting heat to the air, through metal fins.
5.noun(of buildings) A finned metal fixture that carries hot water or steam in order to heat a room.
6.nounA type of antenna.
7.adjectiveFavoring fundamental change, or change at the root cause of a matter."His beliefs are radical."
8.adjectivePertaining to a root (of a plant).
9.adjectivePertaining to the basic or intrinsic nature of something.
10.adjectiveThoroughgoing; far-reaching."The spread of the cancer required radical surgery, and the entire organ was removed."
11.adjectiveOf or pertaining to the root of a word.
12.adjective(of a sound) Produced using the root of the tongue.
13.adjectiveInvolving free radicals.
14.adjectiveRelating to a radix or mathematical root."a radical quantity; a radical sign"
15.adjective(1980s & 1990s) Excellent; awesome."That was a radical jump!"
16.nounThe distance between the front and rear sights of a firearm.