An area or point within a reaction system at which the temperature is appreciably higher than in the bulk of the reactor; usually locates the reaction front.

A word in a multiprocessor memory that several processors attempt to access simultaneously, creating a conflict or bottleneck.

An area in a pipeline that is subject to excessive corrosion.

A forest region where fires occur at frequent intervals.

A region of excessive illumination on a photo.

A site in a gene at which there is an unusually high frequency of mutation.

1. A surface area of higher than average radioactivity.

2. A part of a reactor fuel surface element that has become overheated.

A localized region with temperature higher than the surroundings.