jalousies

Noun

jalousie (plural jalousies)

1. A component in a ventilation system.
2. Upward sloping window slats which form a blind or shutter, allowing light and air in but excluding rain and direct sun.
   • A small lofty room, with its window wide open, and the wooden jalousie-blinds closed, so that the dark night only showed in slight horizontal lines of black, alternating with their broad lines of stone colour.1859, Charles Dickens, A Tale of Two Cities
3. A pastry with the upper side sliced before final baking to resemble a wooden slatted blind.