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
pH
1909, from German
PH
, introduced by S.P.L. Sörensen, from
P
, for German
Potenz
"potency, power" +
H
, symbol for the hydrogen ion that determines acidity or alkalinity.