a small combined radio transmitter and receiver, usually operating on shortwave, that can be carried around by one person: widely used by the police, medical services, etc
A small and portable radio transmitter and receiver (WWII Army)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source