The SIsters of the Third Order of St. Francis

The Sisters of the Third Order of St. Francis came up in conversation recently, and I admit I knew nothing about them. So I did what we do now a-day - I did an internet search. And it got me thinking....what is that white bib-like thing called that nuns used to wear. My teachers at Our Lady of Sorrows School were Sisters of St. Joseph and looked like this:

Anyway - it's called a wimple.