perpetually growing tooth

per·pet·u·al·ly grow·ing tooth

a physiologic phenomenon whereby the tooth continually or constantly grows, calcifies, and erupts; for example, the rat incisor tooth.
Farlex Partner Medical Dictionary © Farlex 2012

per·pet·u·al·ly grow·ing tooth

(pĕr-petyū-ă-lē grōwing tūth)
Physiologic phenomenon whereby tooth continually or constantly grows, calcifies, and erupts; e.g., the incisor tooth in rats.
Medical Dictionary for the Dental Professions © Farlex 2012