from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Characteristic of a tortoise, or the shell of a tortoise
- adj. As slow as a tortoise
from the GNU version of the Collaborative International Dictionary of English
- adj. Resembling the shell of a tortoise.
from The Century Dictionary and Cyclopedia
- Resembling the carapace of a tortoise.
Sorry, no etymologies found.
-- I don't think there is one of our boarders quite so testudineous as I am.