rad

/ɹæd/

noun

1
In 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

1
Anything which radiates or emits rays.
2
A device that lowers engine coolant temperature by conducting heat to the air, through metal fins.
3
(of buildings) A finned metal fixture that carries hot water or steam in order to heat a room.
4
A type of antenna.

1
Favoring fundamental change, or change at the root cause of a matter.
“His beliefs are radical.”
2
Pertaining to a root (of a plant).
3
Pertaining to the basic or intrinsic nature of something.
4
Thoroughgoing; far-reaching.
“The spread of the cancer required radical surgery, and the entire organ was removed.”
5
Of or pertaining to the root of a word.
6
(of a sound) Produced using the root of the tongue.
7
Involving free radicals.
8
Relating to a radix or mathematical root.
“a radical quantity; a radical sign”
9
(1980s & 1990s) Excellent; awesome.
“That was a radical jump!”