quword
趣词
Word Origins Dictionary
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
irradiation (n.)
1580s, from French
irradiation
, from Latin
*irradiationem
, noun of action from past participle stem of
irradiare
(see
irradiate
). Originally of light (literally and figuratively); of X-rays, etc., from 1901.