From ZooTerms (Dictionary of Invertebrate Zoology)
Arthropoda: Chelicerata) The excretory organs of arachnids; in Araneae, located opposite the coxae of the first and third legs, that function in collecting wastes into a saccule and discharging them through tubes opening behind the coxae.coxal glands: 1. (
3. (Onychophora) The nephridia of Peripatus.