Definition of "chemisette"
An item of women's clothing, popular in the 1860s and 1870s, worn to fill in the front and neckline of any garment.
Quotations
[Of Italian peasants] And then their dress—the fine plaited chemisette close round the throat—the long gold ear-rings, those indispensables of their toilette—the black velvet boddice, showing the figure to such advantage, laced with gold and coloured silks—the full petticoat—the apron trimmed with gay ribands; all put on so neatly, and with such a fine taste for harmony of colouring.
1831, L[etitia] E[lizabeth] L[andon], chapter VIII, in Romance and Reality. […], volume II, London: Henry Colburn and Richard Bentley, […], page 122