Definition of great land crab
: a large swift-moving dull-grayish land crab (Cardisoma guanhumi) of the family Gecarcinidae that is widely distributed from southern Florida and the West Indies to Brazil, is chiefly nocturnal, and lives in deep burrows or the open fields or woods and returns to the sea only to breed — called also
guanhumi, juey, tourlourou, white land crab
