noun. An electronic device that restricts current flow chiefly to one direction.

noun. An electron tube with a cathode and anode.

noun. A two-terminal semiconductor device used chiefly as a rectifier.

Of two ways; in elect. teleg., same as duplex.

noun. In botany, the rudimentary or transition body in vascular plants which develops into the prothallium.

noun. An electronic device that allows current to flow in one direction only; a valve.

noun. A two-terminal semiconductor device, having a p-n junction, used chiefly as a rectifier.

noun. a thermionic tube having two electrodes; used as a rectifier

noun. a semiconductor that consists of a p-n junction

"The evil geniuses* at Wicked Lasers have weaponized a laser for the consumer market by simply (?) rejiggering an unreasonably-powerful blue laser diode from a home theater projector and placing it in a lightsaber casing."