po·lyt·ri·cha·les \ ̷ ̷ˌ ̷ ̷ ̷ ̷ˈkā(ˌ)lēz\noun plural Usage: capitalized Etymology: New Latin, from Polytrichum + -ales : an order of Musci that is coextensive with the family Polytrichaceae or sometimes includes this together with the genus Dawsonia — see dawsoniales