cathode

名词 n.
中文释义

英文释义

名词 n.
  1. An electrode, of a cell or other electrically polarized device, through which a positive current of electricity flows outwards (and thus, electrons flow inwards). It can have either a negative or a positive voltage with respect to anode of the same polarized device (depending on whether the device is a load or a source, respectively).
  2. The electrode at which chemical reduction of cations takes place, usually resulting in the deposition of metal onto the electrode. broadly
  3. The electrode from which electrons are emitted into a vacuum tube or gas-filled tube.
  4. That electrode of a semiconductor device which is connected to the n-type material of a p-n junction.

词形变化

cathodes plural kathode alternative,archaic

词汇关系

反义词
anode
衍生词
anticathode biocathode cascode cathodal cathode dark space cathode ray cathode-ray tube cathodic cathodograph cathodoluminescence cathodoluminescent catholyte cold cathode cold-cathode fluorescent lamp cold-cathode lamp cold-cathode light cold-cathode tube hot cathode microcathode multicathode photocathode
相关词
cation

词源

From Ancient Greek κατα- (kata-, “down”) and ὁδός (hodós, “journey, way”), equivalent to Ancient Greek κάθοδος (káthodos, “way down, descent”). Coined by English polymath William Whewell in 1834 for Michael Faraday, who introduced it later that year. By surface analysis, cath- (alternative form of cata-) + -ode.
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