Definify.com
Webster 1913 Edition
Washerwoman
Wash′er-womˊan
,Noun.
pl. 
Washerwomen
. 1. 
A woman who washes clothes, especially for hire, or for others. 
2. 
(Zool.) 
The pied wagtail; – so called in allusion to its beating the water with its tail while tripping along the leaves of water plants. 
[Prov. Eng.]