ONLINE ETYMOLOGY
DICTIONARY
- 1886, from Gk. di- "twice" + hodos "way" (see cede).
WIKIPEDIA
At the time of their
invention, such devices were known as rectifiers.
In 1919, the year tetrodes
were invented, William
Henry Eccles coined the term diode from the Greek
roots di (from δί), meaning "two", and
ode (from ὁδός), meaning "path".
In
electronics, a
diode is a two-terminal
electronic
component with an asymmetric transfer
characteristic, with low (ideally zero) resistance
to current flow in one direction, and high (ideally infinite)
resistance in the other. A semiconductor diode, the most
common type today, is a crystalline
piece of semiconductor
material with a p-n
junction connected to two electrical terminals.[1]
A vacuum tube diode is a vacuum
tube with two electrodes,
a plate
(anode) and heated cathode.
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