'group O' definitions:
Definition of '
group O
'
From:
WordNet
noun
The blood group whose red cells carry neither the A nor B antigens; "people with type O blood are universal donors" [syn:
O
,
type O
, group O]
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
