rootâ² canal` ther`apy. n. 1. the branch of endodontics that treats disease of the dental pulp. 2. a treatment for such disease in which the pulp is removed and replaced by filling material.
A textphone is a device that enables phone calls to be made using text. Textphone software can be used on a computer to enable it to be used as a textphone.
A pager (also known as a beeper) is a wireless telecommunications device that receives and displays numeric and/or receives and announces voice messages.ne of the first practical paging services was launched in 1950 for physicians in the New York City area. Physicians paid $ 12 per month for the service and carried a 6 oz (200 g) pager that would receive phone messages within 25 mi (40 km) of a single transmitter tower.