cat·o·met·o·pa \ˌkad.ˈmed.əpə\noun plural Usage: capitalized Etymology: New Latin, from cato- + Latin metopa metope — more at metope in former classifications: a division of crabs comprising the grapsoid members of Brachyrhyncha • cat·o·met·ope\-ˈmed.ˌōp, -eˌtōp\noun-s