Word Study
testudinata
CIDE DICTIONARY
testudinata, n. pl. [Nl. See Testudo.].
An order of reptiles which includes the turtles and tortoises. The body is covered by a shell consisting of an upper or dorsal shell, called the carapace , and a lower or ventral shell, called the plastron , each of which consists of several plates. [1913 Webster]
For further exploring for "testudinata" in Webster Dictionary Online