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any member of the class arachnida.
Any of various arthropods of the class Arachnida, such as spiders, scorpions, mites, and ticks, characterized by four pairs of segmented legs and a body that is divided into two regions, the cephalothorax and the abdomen.
a·rach′ni·dan (-nĭ-dən) adj. & n.
Etymology: Gk, arachne, spider
a member of the phylum Arthropoda, class Arachnida, which includes spiders, scorpions, mites, and ticks.
arachnidadjective Referring to a member of the class Arachnida (e.g., spiders).
noun A member of the class Arachnida (e.g., spiders).
arachnidAny of the eight-legged arthropods of the class Arachnida , including spiders, scorpions, mites, and ticks. From the Greek arachne , a spider.
arachnoidany member of the class Arachnida in the phylum Arthropoda. The class contains scorpions, spiders, harvestmen, ticks, mites and king crabs. They lack antennae, usually possess four pairs of walking legs, and, excepting Limulus (king crab), are air-breathing.
Large class of arthropods that includes spiders, scorpions, mites, and ticks. Arachnids have a segmented body divided into two parts, one of which has four pairs of legs but no antennae.
Mentioned in: Bites and Stings
a member of the class Arachnida of animals.