Body of Fire 2 : An intense mass of flame, often accompanied by heavy smoke under pressure, indicating the heart of a fire, as distinguished from light con-centrations of smoke or gases or small amounts of flame
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}