testudinarious

adjective2

1. •
   Resembling or pertaining to the shell of a tortoise.

   • But the mists had not managed to suck from them their testudinarious colours. — 2011
2. •
   (rare) tortoise-like

   • at times the watching throng of newspersons and police became decidedly impatient with our testudinarious pace — 1984