hydrography noun. [hʌɪ'drɒgrǝfi] M16.
[from HYDRO- + -GRAPHY, after geography.]
1. The branch of science that deals with seas, lakes, rivers, etc., including the mapping of them, their currents and tides, and (formerly) the principles of navigation; a book in which such bodies of water are scientifically described. M16.

2. The hydrographic features of a region. M19.

■ hydrographer noun an expert in or student of hydrography; esp. a person who makes hydrographic surveys and charts of the sea and its currents: M16.

■ hydro'graphic adjective of or pertaining to hydrography M17.

■ hydro'graphical adjective = hydrographic L16.

■ hydro'graphically adverb as regards hydrography or hydrographic features E18.

[TahlilGaran] English Dictionary ▲