Waldenses
Concise Oxford English Dictionary © 2008 Oxford University Press:
Waldenses /wɒlˈdɛnsiːz/
▶plural noun a puritan religious sect originating in southern France.
– derivatives
Waldensian adjective & noun.
Waldensian adjective & noun.
– origin named after the founder, Peter Valdes (d.1205).
'Waldenses' also found in these Oxford entries:

