The Collaborative International Dictionary
Testudineous
Testudineous \Tes`tu*din"e*ous\, a. [L. testudineus.] Resembling the shell of a tortoise.
Wiktionary
testudineous
a. 1 Characteristic of a tortoise, or the shell of a tortoise 2 As slow as a tortoise alt. 1 Characteristic of a tortoise, or the shell of a tortoise 2 As slow as a tortoise