http://dictionary.reference.com/browse/laundromat
and— n
( US ), ( Canadian ), ( NZ ) trademark Launderette , Also called (in Britain and certain other countries): laundrette a commercial establishment where clothes can be washed and dried, using coin-operated machines
laundromat
1943, originally a proprietary name by Westinghouse; from laundry + ending probably suggested by automat-. An earlier word for it in U.S. was washateria (1935).