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
tetrad
noun
1.
the cardinal number that is the sum of three and one
fower
4
four
foursome
IV
Little Joe
quadruplet
quartet
quatern
quaternary
quaternion
quaternity