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
pentagrid
"A thermionic valve having five grids; a heptode", 1930s; earliest use found in
Wireless World
. From
penta-
+
grid
.