Learn how to say Plexiglas correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word Plexiglas:
[mass noun] trademark, chiefly North American
a solid transparent plastic made of polymethyl methacrylate (the same material as Perspex or Lucite):
panels of light-filtering Plexiglas
the smart Plexiglas cases of the contemporary art museum
1930s: from Greek plēxis ‘percussion’ + glass