Tortoise
(Heb. tsab). The tsab occurs only in Le 11:29 as the name of some unclean animal. The Hebrew word may be identified with the kindred Arabic dhab, "a large kind of lizard," which appears to be the Psommosaurus scincus of Cuvier.
Bibliography Information Smith, William, Dr "Definition for 'Tortoise' Smiths Bible Dictionary". bible-history.com - Smiths; 1901.