rad

Adjective

radical (comparative more radical, superlative most radical)

1. (not comparable) Of or pertaining to the root of a plant.
2. (not comparable) Of or pertaining to the root of a word.
3. (not comparable) Produced using the root of the tongue.
4. Relating to a radix or mathematical root.
   • a radical quantity; a radical sign
5. Pertaining to the basic or intrinsic nature of something.
   • The most determined exertions of that authority, against them, only showed their radical independence.1790 November, Edmund Burke, Reflections on the Revolution in France, and on the Proceedings in Certain Societies in London Relative to that Event. […], London: […] J[ames] Dodsley, […], →OCLC

   Synonyms:

   fundamental

   Antonyms:

   ignorable, trivial

6. Favoring fundamental change, or change at the root cause of a matter.
   • His beliefs are radical.

See all 23 meanings of radical

Noun

radiator (plural radiators)

1. Anything which radiates or emits rays.
2. A device that lowers engine coolant temperature by conducting heat to the air, through metal fins.
   • The car overheated because of a broken radiator.
3. A finned metal fixture that carries hot water or steam in order to heat a room.
   • The radiator kept the apartment warm during winter.
4. A type of antenna.