Definition of “arachnid” - English Dictionary

british dictionary

“arachnid” in British English

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arachnidnoun [ C ]

uk /əˈræk.nɪd/ us /əˈræk.nɪd/ specialized

any of a group of small animals, similar to insects but with four pairs of legs, that include spiders, scorpions, ticks, and mites

(Definition of “arachnid” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)