in a petrol engine, part of the manifold that is heated by the exhaust gases it receives from the cylinders to vaporize the fuel

in molecular biology, a region of DNA that is particularly prone to spontaneous mutation, or recombination (combination of genes in an offspring not found in the parents)

in electronics, a small region of an electrode where the temperature is raised above the average

in geology, an area of greater heat deep within the earth's mantle that is associated with increased volcanic activity at the earth's surface

in nuclear engineering, a highly radioactive area in a plant or reactor

in image technology, a point in an interactive video image that can be clicked on to access information from elsewhere

a place in a public area or building where wireless access to the Internet is provided