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
undulation (n.)
[undulation 词源字典]
1640s, from Medieval Latin
*undulatio
, from Late Latin
undulatus
"wavy, undulated," from
undula
"wavelet," diminutive of Latin
unda
"wave" (see
water
(n.1)).
[undulation etymology, undulation origin, 英语词源]