An arachnid is a type of animal that usually has eight legs and no antennae, such as spiders, scorpions, ticks, and mites.
From Greek "arákhnē" meaning "spider." Scientists used the word to name the whole group of spider-like creatures.
Not all arachnids spin webs—ticks and mites are in the club too. So if you fear spiders, your brain has actually tagged a whole secret army of related creatures.
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