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Meaning of hydrography

hy•drog•ra•phy

Pronunciation: (hī-drog'ru-fē), [key]
— n.
  1. the science of the measurement, description, and mapping of the surface waters of the earth, with special reference to their use for navigation.
  2. those parts of a map, collectively, that represent surface waters.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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