The Collaborative International Dictionary
Elephantine tortoise
Elephantine \El`e*phan"tine\, a. [L. elephantinus of ivory, Gr. ?: cf. F. ['e]l['e]phantin.] Pertaining to the elephant, or resembling an elephant (commonly, in size); hence, huge; immense; heavy; as, of elephantine proportions; an elephantine step or tread.
Elephantine epoch (Geol.), the epoch distinguished by the
existence of large pachyderms.
--Mantell.
Elephantine tortoise (Zo["o]l.), a huge land tortoise; esp., Testudo elephantina, from islands in the Indian Ocean; and T. elephantopus, from the Galapagos Islands.
Wiktionary
elephantine tortoise
n. A huge land tortoise, especially ''Testudo elephantina'', from islands in the Indian Ocean, or ''T. elephantopus'', from the Galapagos Islands.