From Longman Dictionary of Contemporary EnglishPerspexPer‧spex /ˈpɜːspeks $ ˈpɜːr-/ noun [uncountable] trademark British English HCPa strong type of plastic that can be used instead of glass
Examples from the Corpus
Perspex• Beneath lay a line of glum sandwiches, a Perspex dish of an unidentifiable fish meat and a mutilated leg of ham.• A supply of Perspex offcuts can often be obtained from firms making illuminated signs.• I use a very small one that looks like a pencil or pen. Perspex rulers are invaluable.• The pilots sit high on adjustable seats for the best panorama, and their doors have vertically-sliding Perspex windows and integral arm-rests.• Transparent Perspex makes ideal T-square blades. 