casement window

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Noun1.casement window - a window with one or more casementscasement window - a window with one or more casements
window - a framework of wood or metal that contains a glass windowpane and is built into a wall or roof to admit light or air
References in periodicals archive ?
The windows are beautifully proportioned with inset casement sash windows and delicate glazing bars.
For ventilation, the casement sash opens fully, and can be positioned to divert breezes into the house.