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Hydrology vs Undefined - What's the difference?

hydrology | undefined |

As a noun hydrology

is the science of the properties, distribution, and effects of water on a planet's surface, in the soil and underlying rocks, and in the atmosphere.

As an adjective undefined is

lacking a definition or value.

hydrology

English

(wikipedia hydrology)

Noun

(en-noun)
  • The science of the properties, distribution, and effects of water on a planet's surface, in the soil and underlying rocks, and in the atmosphere

    • Derived terms

    * dendrohydrology * ecohydrology * hydrologist * radiohydrology

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined