testudinate adjective 2noun 1forms 3 adjective2 •Of, like or relating to a tortoise.2003: Fans of the testudinate pace and art-house vibe of writer-director Sally Potter — editorial review of the DVD The Man Who Cried, http://amazon.com — 2003 •Resembling a tortoise shell in appearance or structure; arched; vaulted. noun1 •A turtle.Cope..enumerates.. 13 sea-saurians, 48 testudinates, and 50 sea serpents. — 1880 formstestudinates · more testudinate · most testudinate