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1. The scientific study of spiders and related animals such as scorpions, pseudoscorpions, harvestmen, collectively called arachnids.
2. A branch of zoology that studies spiders and arachnids. (-Ologies & -Isms. Copyright 2008 The Gale Group, Inc.)

Syn: arachnidology, araneology

Word origin: from Greek ἀράχνη, arachnē (spider); and -λογία, -logia (study)

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