# hot zone
## English
### Noun

hot zone (plural hot zones)
* (firefighting) An area to which access is restricted because it is contaminated with radiation or a chemical or biological biohazard.
** 1997, U S Fire Administration, FEMA, Fire Department Response to Biological Threat at B'nai B'rith Headquarters, page 6:A hot zone was established quickly. Unfortunately, these efforts were compromised by a few MPD officers on the scene who did not understand the serious nature of the potential chemical/biological threat and treated the incident more as a bomb scare. These officers initially crossed in and out of the hot zone, and could have contaminated themselves and other personnel had this been a real incident.
** 2004, Stanley E. Toy, Hot Zone Log: Personal HazMat Record, page 22:Medical monitoring is an essential aspect to conducting operations in the hot zone.
** 2012, Jeff Kingston, Contemporary Japan, page 210:Subsequently, it became evident that Iitate was a hot zone with very high levels of radiation contamination and all of its residents and evacuees had to be evacuated.
* An area where fighting or hostilities are likely to erupt.
** 2012, Jim Scott, Wanderings and Sojourns:The bush war still scared him. Even more this day for he knew he was to travel through a hot zone with only three other men, none of them soldiers either, to an area close to the Gona-Re-Zhou transited extensively by groups of well armed communist trained insurgents based in Mozambique.
** 2014, Lorenzo Carcaterra, The Wolf:Any spot I could point to on a map was about to turn into a hot zone. There was too much trougle brewing for it not to bubble over, and by the summer of 2012, I had a major decision to make.
** 2015, Gustavo Morello, The Catholic Church and Argentina's Dirty War, page 52:In the Argentina of the seventies, Tucumán was a “hot” zone.
** 2018, Mark Coppenger, A Skeptic's Guide to Arts in the Church:Evangelical discourse on the role of arts in the church can be radioactive, and the twenty-one contributors to this book walk right into the ""hot zone"" to pick up on twenty contentious questions.
* An apparatus for growing crystals at very hot temperatures.
** 2014, Peter Rudolph, Handbook of Crystal Growth: Bulk Crystal Growth, page 140:The “hot zone” is the key part in controlling the growth process, the melt and gas flow, and the concentration of the intrinsic point defects and their aggregates.
** 2014, Golla Eranna, Crystal Growth and Evaluation of Silicon for VLSI and ULSI, page 126:The temperature field in the hot zone is, to a large extent, determined by the distribution of the induced Joulean heat or EM power.
** 2018, Roberto Fornari, Single Crystals of Electronic Materials: Growth and Properties, page 64:Most hot-zone designs for CZ growth are focused on cost reduction. An efficient hot zone is designed for high pulling speeds or high production per hour (PPH, kg/h) and low power consumption.
* Used other than figuratively or idiomatically: see hot,‎ zone.
** 2014, Ryan Bañagale, Arranging Gershwin:The goal was for passengers to feel relaxation in the initial cool zone, a bit more motion in the hot zone at the center, and a renewed sense of relaxation as they entered the second cool zone and exited the space.