"(In some former classifications) designating a division of the Metazoa including arthropods and segmented worms (corresponding broadly to the Articulata of Cuvier); relating to this group", Late 19th cent.; earliest use found in Thomas Huxley (1825–1895), biologist and science educationist. From arthro- + -zoic, after scientific Latin Arthrozoa, former group name.[arthrozoic etymology, arthrozoic origin, 英语词源]