n.
Pronunciation: ə - ' rak-n ə d, - ˌ nid
Function: noun
Date: 1869
: 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