noun arach·nid \ə-ˈrak-nəd, -ˌnid\

: a kind of animal that has eight legs and a body formed of two parts

Full Definition of ARACHNID

:  any of a class (Arachnida) of arthropods comprising chiefly terrestrial invertebrates, including the spiders, scorpions, mites, and ticks, and having a segmented body divided into two regions of which the anterior bears four pairs of legs but no antennae
arachnid adjective

Examples of ARACHNID

  1. Spiders, scorpions, mites, and ticks are arachnids.

First Known Use of ARACHNID



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