Safety glass

Safety glass is glass manufactured or treated to reduce injury when broken, typically by fragmenting into small pieces or remaining bonded to an interlayer.

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Tempered glass: Glass strengthened by heating and rapid cooling, leaving its surfaces in compression and its core in tension. Its stored stresses make it break into many small pieces rather than sharp shards.
Automotive glazing: Glass components used in vehicle windows, windscreens, and other glazed openings. Vehicles combine laminated windscreens with other glazing chosen for occupant protection.
Heat-strengthened glass: Glass heat-treated to be stronger than annealed glass but less stressed than fully tempered glass. It resists greater loads than annealed glass but does not break into the same small fragments as tempered glass.
Glass shard: A sharp fragment produced when glass breaks. Reducing dangerous shards is a central aim of safety-glass treatments.
Laminated glass: Glass panes bonded to a plastic interlayer that holds fragments together when the glass cracks. The interlayer keeps broken glass in place instead of letting it fall apart.
Windshield: A vehicle's front window, designed to provide visibility and help protect occupants. Its laminated construction helps prevent occupants from being ejected through the opening.
Wired glass: Glass containing an embedded wire mesh that can hold some fragments together when cracked. Its mesh may retain fragments, but the glass can still break into hazardous shards.
Laceration: A wound caused by a cut or tear in skin or other tissue. Sharp fragments from broken ordinary glass can cause severe cuts.
Polyvinyl butyral: A transparent, tough plastic commonly used as the interlayer in laminated glass. It bonds laminated-glass panes and retains fragments after impact.
Building code: A set of legally enforceable rules governing the design and construction of buildings. Codes specify where glazing must meet safety requirements.