Lantern Skylight : A roof structure with glass sides that allows light to enter the building; it may be a means of ventilating a building during a fire
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}