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Medical Definition of Nasal index
1. Relation of the greatest width of the nasal aperture to the length of a line from the nasion to the lower border of the nasal aperture: (nasal width × 100)/nasal height. (05 Mar 2000)
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1. Relation of the greatest width of the nasal aperture to the length of a line from the nasion to the lower border of the nasal aperture: (nasal width × 100)/nasal height. (05 Mar 2000)