armor-plate glass

bullet-resisting glass

A laminated assembly consisting of four or more sheets of glass stacked alternately with layers of a transparent plastic resin, then bonded under heat and pressure.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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There was a steel safety bulkhead that "shielded the passenger compartment from head-on collisions," a laminated safety glass windshield that was mounted in a "sponge rubber fastening so that a hard blow from within will eject it in one piece" and windows made out of armor-plate glass, so that they would disintegrate without cutting edges or slivers.