underweight /un″dərwāt′/ [AS, under + wiht] , 1. a body mass index of less than 18.5. See also body mass index. 2. less than normal in body weight after adjustment for height, body build, and age.
underweight
underweight /un″dərwāt′/ [AS, under + wiht] , 1. a body mass index of less than 18.5. See also body mass index. 2. less than normal in body weight after adjustment for height, body build, and age.