society > communication > telecommunication > radio communications > radio equipment > [noun] > radio set > type of transmitter (3)
(a) = baby-minder n.; (b) (in hospitals) a device which measures the vital signs of an ill baby or child; (c) an intercom system which enables a…
A transmitter used for jamming.
Name given to a portable radio transmitter used by wrecked airmen to signal their position to rescue ships or aircraft. Also attributive.