glassite

1. uncountableliteratureA fictional material, typically described as being transparent like glass.

   1 more example

   One of those cyclopean cylinders could, conceivably, miss the guiding beam and crash half a mile from its expected landing point—through the glassite roof of the immense waiting room perhaps—so that only a thin organic vapor and some powdered phosphates would be left behind to mark the passing of a thousand men.

   1953, Isaac Asimov, Second Foundation, New York, N.Y.: Avon Books, page 135

plural Glassites

1. alternativeAlternative form of Glasite.