Meaning of rapidly advancing juvenile periodontitis

rap'idly advanc'ing ju'venile periodonti'tis

Pronunciation: [key]
— Dentistry. Dentistry.
  1. a rare, rapidly progressive and destructive infectious periodontal disease that usually affects the front teeth and first permanent molars of children.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.