radiator
UK[ˈreɪ.di.eɪ.tər]US[ˈreɪ.diˌeɪ.t̬ɚ]
n
A device for heating a room, consisting of a metal container connected by pipes through which hot water is pumped.
n
A device for cooling the engine of a vehicle or aircraft, consisting of a bank of thin tubes through which water or coolant flows.
Morpheme Breakdown
radi
ator
radi
to emit rays
ator
agent suffix
Etymology
The word radiator originates from the Latin verb radiare, meaning "to emit rays" or "to shine," itself derived from radius (ray, spoke). The core concept is emission from a central point. In the 19th century, the term was applied to heating devices that emitted warmth (radiant heat) outward into a room. This logic was later extended to the cooling device in engines, which functions by dissipating (or "radiating") unwanted heat from the engine's core into the surrounding air, thus completing the conceptual journey from emitting light rays to emitting thermal energy.
Analysis
Structure: radi (to emit rays) + ator (agent suffix)
- radi: From Latin radius (ray, spoke of a wheel). In this word, it carries the sense of "emitting from a center."
- ator: A Latin agent noun suffix (equivalent to -er), indicating a person or thing that performs an action.
Examples
The old cast-iron radiator in the hallway clanked loudly when the heat came on.
After the long drive, steam began pouring from a crack in the car's radiator.
The electric radiator provides a quick source of supplemental warmth for the drafty office.