'Ordovician' definitions:
Definition of '
Ordovician
'
(from
WordNet
)
noun
From 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds [syn: Ordovician,
Ordovician period
]
Words containing '
Ordovician
'
ordovician period
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
