See Also: mesosaur(dictionary)

mesosaur (iou)



mesosaur noun. L19.
[mod. Latin Mesosaurus (see below), from Greek mesos middle + sauros lizard.]
Palaeontology. A small aquatic reptile of the genus Mesosaurus, of the early Permian period, with an elongated body, flattened tail, and a long narrow snout with many needle-like teeth.