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 landline telephone is a device with a physical line connection to a telecommunications network. Landline phones were developed in the late 19th century and became common around the world in the following decades. Cellular networks in the 2000s began to replace landlines as the dominant form of telephone connectivity.