arthropod - invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin

Arachnida, class Arachnida - a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings

harvestman, Phalangium opilio, daddy longlegs - spider-like arachnid with a small rounded body and very long thin legs

scorpion - arachnid of warm dry regions having a long segmented tail ending in a venomous sting

false scorpion, pseudoscorpion - small nonvenomous arachnid resembling a tailless scorpion

whip scorpion, whip-scorpion - nonvenomous arachnid that resembles a scorpion and that has a long thin stingless tail

spider - predatory arachnid that usually has silk-spinning organs at the back end of the body; they spin silk to make cocoons for eggs or traps for prey

acarine - mite or tick