Judging by the pictures of them, this is what they are. Is your text from Uruguay? That's where most of the refs. to this type of window are from.

This page has one in glass and one in wood:
http://listado.mercadolibre.com.uy/Ventana-tabaquera-en-carp...

Picture of a jalousie window:
http://www.sturdi-built.com/images/Jalousie window.jpg

A jalousie window (pronounced /ˈdʒæləsiː/) (US) or louvre window (UK) is a window which consists of parallel glass, acrylic, or wooden louvers set in a frame. The louvers are locked together onto a track, so that they may be tilted open and shut in unison, to control airflow through the window. They are usually controlled by a crank mechanism.
http://en.wikipedia.org/wiki/Jalousie_window