noun1. any herbivorous terrestrial chelonian reptile of the family Testudinidae, of most warm regions, having a heavy dome-shaped shell and clawed limbs
 ▶ Related adjectives: 
chelonian, testudinal 2.  water tortoise
4.   another word for testudo,   See also giant tortoise 
 Word origin
C15: probably from Old French 
tortue (influenced by Latin 
tortus twisted), from Medieval Latin 
tortūca, from Late Latin 
tartarūcha coming from Tartarus, from Greek 
tartaroukhos; referring to the belief that the tortoise originated in the underworld