| hyetograph | A chart or graphic representation of the average distribution of rain over the surface of the earth. Origin: Gr. Rain + -graph. Source: Websters Dictionary (01 Mar 1998) |
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| hyetographic | Of or pertaining to to hyetography. Source: Websters Dictionary (01 Mar 1998) |
| hyetography | The branch of physical science which treats of the geographical distribution of rain. Source: Websters Dictionary (01 Mar 1998) |