Definify.com
Webster 1913 Edition
Radiation
Raˊdi-a′tion
(rāˊdĭ-ā′shŭn)
, Noun.
[L.
radiatio
: cf. F. radiation
.] 1.
The act of radiating, or the state of being radiated; emission and diffusion of rays of light; beamy brightness.
2.
The shooting forth of anything from a point or surface, like the diverging rays of light;
as, the
. radiation
of heatWebster 1828 Edition
Radiation
RADIA'TION
,Noun.
1.
The emission and diffusion of rays of light; beamy brightness.2.
The shooting of any thing from a center, like the diverging rays of light.