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| Arabic | English |
| كثافة السكان | population density The number of people relative to the space occupied by them |
| كثافة الإسكان - كثافة المساكن | housing density The number of dwelling units or the residential population of a given geographic area |
| مقياس كثافة السوائل | hydrometeorology That part of meteorology of direct concern to hydrologic problems, particularly to flood control, hydroelectric power, irrigation, and similar fields of engineering and water resource |