any body part visible externally

either of the first pair of fang-like appendages near the mouth of an arachnid; often modified for grasping and piercing

any part of the mouth of an insect or other arthropod especially one adapted to a specific way of feeding

an appendage of insects that is capable of injecting venom; usually evolved from the legs

a grasping structure on the limb of a crustacean or other arthropods

one of a pair of fleshy appendages of a polychete annelid that functions in locomotion and breathing