Pronunciation: (är'thru-pod"),[key] —n. any invertebrate of the phylum Arthropoda, having a segmented body, jointed limbs, and usually a chitinous shell that undergoes moltings, including the insects, spiders and other arachnids, crustaceans, and myriapods.
—adj. Also,ar•throp•o•dalPronunciation: (är-throp'u-dl),[key]ar•throp•o•danPronunciation: (är-throp'u-dn),[key]ar•throp•o•dousPronunciation: (är-throp'u-dus).[key]belonging or pertaining to the Arthropoda.