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[hahy-drog-ruh-fee] /haɪˈdrɒg rə fi/

the science of the measurement, description, and mapping of the surface waters of the earth, with special reference to their use for navigation.
those parts of a map, collectively, that represent surface waters.
the study, surveying, and mapping of the oceans, seas, and rivers Compare hydrology
the oceans, seas, and rivers as represented on a chart

1550s, from hydro- + -graphy. Related: Hydrographic


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  • Hydroid

    [hahy-droid] /ˈhaɪ drɔɪd/ adjective 1. noting or pertaining to that form of hydrozoan that is asexual and grows into branching colonies by budding. noun 2. the phase of a hydrozoan coelenterate that consists of polyp forms usually growing as an attached colony. /ˈhaɪdrɔɪd/ adjective 1. of or relating to the Hydroida, an order of colonial […]

  • Hydrokinetic

    [hahy-droh-ki-net-ik, -kahy-] /ˌhaɪ droʊ kɪˈnɛt ɪk, -kaɪ-/ adjective 1. pertaining to the motion of liquids. 2. of or relating to . /ˌhaɪdrəʊkɪˈnɛtɪk; -kaɪ-/ adjective 1. of or concerned with fluids that are in motion 2. of or concerned with hydrokinetics hydrokinetic hy·dro·ki·net·ic (hī’drō-kə-nět’ĭk, -kī-) or hy·dro·ki·net·i·cal (-ĭ-kəl) adj. Of or relating to the kinetic energy […]

  • Hydrokinetics

    [hahy-droh-ki-net-iks, -kahy-] /ˌhaɪ droʊ kɪˈnɛt ɪks, -kaɪ-/ noun, (used with a singular verb) 1. the branch of hydrodynamics that deals with the laws governing liquids or gases in motion. /ˌhaɪdrəʊkɪˈnɛtɪks; -kaɪ-/ noun 1. (functioning as sing) the branch of science concerned with the mechanical behaviour and properties of fluids in motion, esp of liquids Also […]


    [hahy-druh-lant] /ˈhaɪ drəˌlænt/ noun 1. an urgent warning of navigational dangers in the , issued by the U.S. Navy Hydrographic Office.

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