'D region' definitions:
Definition of '
D region
'
(from
WordNet
)
noun
The lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves [syn:
D-layer
, D region]
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
