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Medical Definition of Vital ultraviolet
1. Rays necessary or helpful to normal growth; they promote calcium metabolism, are antirachitic in action, and have wavelengths between 3200 and 2900 A°. (05 Mar 2000)
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1. Rays necessary or helpful to normal growth; they promote calcium metabolism, are antirachitic in action, and have wavelengths between 3200 and 2900 A°. (05 Mar 2000)