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rad

/ɹæd/

noun

Meaning

  • A non-SI unit of absorbed dose of radiation, equal to 0.01 gray.

Synonyms

rd

noun

Meaning

  • 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

noun

Meaning

  • Anything which radiates or emits rays.

  • A device that lowers engine coolant temperature by conducting heat to the air, through metal fins.

  • (of buildings) A finned metal fixture that carries hot water or steam in order to heat a room.

  • A type of antenna.

adjective

Meaning

  • Favoring fundamental change, or change at the root cause of a matter.

    "His beliefs are radical."

  • Pertaining to a root (of a plant).

  • Pertaining to the basic or intrinsic nature of something.

  • Thoroughgoing; far-reaching.

    "The spread of the cancer required radical surgery, and the entire organ was removed."

  • Of or pertaining to the root of a word.

  • (of a sound) Produced using the root of the tongue.

  • Involving free radicals.

  • Relating to a radix or mathematical root.

    "a radical quantity; a radical sign"

  • (1980s & 1990s) Excellent; awesome.

    "That was a radical jump!"

Synonyms

primitive,
fundamental

noun

Meaning

  • The distance between the front and rear sights of a firearm.