Teagown. From 1900 women wore a less formal dress at home, also called a teagown. The model on display here is called a robe princesse and follows the curves of the body
1900 Dress by Rose Carraer-Eastman (American). Rhode Island School of Design Museum. : r/fashionhistory
Robe en Batiste, 1900 – Wearing History® Blog
Rate the Dress: a belle in bows, 1898-1900 - The Dreamstress
Lingerie Dresses Slideshow | Fashion and Decor: A Cultural History