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geographic range

noun, Navigation
1.
the distance at which a certain light, as that of a lighthouse, is visible to the eye at a given elevation, assuming that the weather is clear and that the light is sufficiently powerful to be visible from any point at which it appears above the horizon.
Compare luminous range.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for geographic range
  • Causes and consequences of distribution patterns in a migratory songbird across its geographic range.
  • Others are less particular, inhabiting a wide array of stream sizes through an extensive geographic range.

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