Scorpionida

The scorpions; an order of venomous, predaceous, arachnid arthropods characterized by a distinctly segmented bony abdomen terminating in a sharply recurved stinging spine equipped with a poison gland; causes a severely painful but rarely fatal sting. North American genera include Centruroides, Hadrurus, and Vejovis. [Mod. L.]

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Scor·pi·on·ida (skor-pe-onґĭ-də) the scorpions, an order of arachnids with elongated bodies, usually found in tropical or subtropical climates. Numerous genera of the families Buthidae and Hemiscorpiidae are stinging or venomous, usually with venomous stings on their erectile tails. Called also Scorpiones.