jalousie

noun

1. a blind or shutter made with horizontal slats that can be adjusted to admit light and air but exclude rain and the rays of the sun.
2. a window made of glass slats or louvers of a similar nature.

noun

1. a window blind or shutter constructed from angled slats of wood, plastic, etc
2. a window made of similarly angled slats of glass

n.

1766, French, literally “jealousy” (see jealousy), from notion of looking through blinds without being seen.