arc·toi·dea \ärkˈtȯidēə\noun plural Usage: capitalized Etymology: New Latin, from arct- + -oidea : a superfamily of Carnivora comprising bears, raccoons, weasels, and related forms and now but not formerly including the dogs • arc·toi·de·an\(ˈ) ̷ ̷| ̷ ̷dēən\adjective