a device for rectifying a modulated radio-frequency signal, consisting of a crystal of germanium, silicon, galena, or the like with a cat whisker contact, permitting a high-frequency current to pass freely in one direction only: one of the two principal components of a crystal set.
(electronics) a demodulator, used esp in microwave circuits and in early radio receivers, consisting of a thin metal wire in point contact with a semiconductor crystal
- Crystal form
noun 1. (crystallog) a symmetrical set of planes in space, associated with a crystal, having the same symmetry as the crystal class Compare crystal habit
noun 1. the practice of staring into a crystal ball, as by a fortuneteller, to see distant happenings, future events, etc. 2. speculation about the future. noun 1. the act of staring into a crystal globe (crystal ball) supposedly in order to arouse visual perceptions of the future, etc 2. the act of trying to […]
- Crystal habit
noun 1. (crystallog) the external shape of a crystal Compare crystal form
noun [second sense because such persons prize crystals for various putative powers]