bulletproof glass
type of strong but optically transparent material that is particularly resistant to being penetrated when struck
en-GB/ˈbʊlɪtpɹuːf ˈɡlɑːs/
en-US/ˈbʊlətˌpɹuf ˈɡlæs/
type of strong but optically transparent material that is particularly resistant to being penetrated when struck