Wordcyclopedia | English | diode optical pair

— noun a semiconductor that consists of a p-n junction — noun a thermionic tube having two electrodes; used as a rectifier

— If something is optical, it is related to sight, optics or visible light.

— A pair is two things that go together. She has many pairs of shoes, but she only has one pair of pants. Those two make a lovely pair, don't they.

— If you pair two people or things, you put them together. Young women were often paired with older men. They paired up at the dance.