| Noun | 1. | Mastigoproctus giganteus - large whip-scorpion of Mexico and southern United States that emits a vinegary odor when alarmedwhip scorpion, whip-scorpion - nonvenomous arachnid that resembles a scorpion and that has a long thin tail without a stinger genus Mastigoproctus, Mastigoproctus - giant whip scorpions |