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focal depth

focal depth in Medicine

focal depth n.
A measure of the power of a lens to produce clear images at different distances from it. Also called depth of focus.

The American HeritageĀ® Stedman's Medical Dictionary
Copyright Ā© 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Historical Examples
  • The location of an earthquake is commonly described by the geographic position of its epicenter and by its focal depth.

    Earthquakes Kaye M. Shedlock

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