A radiotelephone's a communications device that allows two or more people to talk using radio. There's disagreement about the definition of the term. There's a conflict among British English usage, American English usage, and historic use. Disambiguation Radiotelephone versus mobile telephone, cellular English dictionaries describe the term as a compound word formed from the words radio and telephone, and used to describe a wireless telephone. There's no Radiotelephone entry in Standard Industr… (More on Radiotelephone)