hydrography

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hy·drog·ra·phy / hīˈdrägrəfē/ • n. the science of surveying and charting bodies of water, such as seas, lakes, and rivers.DERIVATIVES: hy·drog·ra·pher / -fər/ n.hy·dro·graph·ic / ˌhīdrəˈgrafik/ adj.hy·dro·graph·i·cal / ˌhīdrəˈgrafikəl/ adj.hy·dro·graph·i·cal·ly / ˌhīdrəˈgrafik(ə)lē/ adv.