re·ba·to (rĭ-bä'tō) n.
pl.re·ba·tos also ra·ba·tos A stiff flaring collar wired to stand up at the back of the head, worn by men and women in the 16th and early 17th century.
[Obsolete French rebateau, alteration of French rabat, from Old French, from rabattre, to turn down again, reduce; see rebate1.]