1. (Zoöl.) Any one of numerous species of pulmonate arachnids of the order scorpiones, having a suctorial mouth, large claw-bearing palpi, and a caudal sting. Note: Scorpions have a flattened body, and a long, slender post- abdomen formed of six movable segments, the last of which terminates in a curved venomous sting. The venom causes great pain, but is unattended either with redness or swelling...