|a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.|
|a chattering or flighty, light-headed person.|
|1.||an area of potential violence or political unrest|
|2.||a lively nightclub or other place of entertainment|
|3.||an area of great activity of a specific type: the world's economic hot spots|
|4.||a. any local area of high temperature in a part of an engine, etc|
|b. part of the inlet manifold of a paraffin engine that is heated by exhaust gases to vaporize the fuel|
|5.||computing a place where wireless internet, esp broadband, services are provided to users of portable computers through a wireless local area network, such as in an airport, railway station, or library|
|a. a small area on the surface of or within a body with an exceptionally high concentration of radioactivity or of some chemical or mineral considered harmful|
|b. a similar area that generates an abnormal amount of heat, as revealed by thermography|
|7.||genetics a part of a chromosome that has a tendency for mutation or recombination|
hot spot n.
A region in a gene in which there is a high rate of mutation. Its existence depends on the size of the region concerned, the readiness with which the mutation can be detected, and the possibility that selection against mutants at that point is less than that against mutants elsewhere.
A volcanic area that forms as a tectonic plate moves over a point heated from deep within the Earth's mantle. The source of the heat is thought to be the decay of radioactive elements. The Hawaiian Islands formed as a series of hot spots. See more at tectonic boundary.
A place deep within the Earth where hot magma rises to just underneath the surface, creating a bulge and volcanic activity (see volcano). The chain of Hawaiian Islands (see Hawaii) is thought to have been created by the movement of a tectonic plate over a hot spot.