Scorpions use the venom gland in their tail to attack prey.
Tips
usage
腺 (xiàn) is the suffix for biological glands: 唾腺 (salivary gland), 汗腺 (sweat gland), 淋巴腺 (lymph gland). 毒腺 is the standard biology textbook term for the venom-producing gland of snakes, scorpions, bees, and similar animals.