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cathode

cath·ode [ ká thd ] (plural cath·odes)

noun

Definition:

1. negative electrode: the negative electrode of an electrolytic cell

2. electron source: the negatively charged source of electrons in an electron tube

3. positive terminal: the positive terminal of a cell that is producing electrical energy by a chemical process that cannot be reversed

[Mid-19th century. < Greek kathodos "way down" < hodos "way"]

ca·tho·dal [ ka thṓd'l ] adjective

ca·tho·dal·ly [ ka thṓdəlee ] adverb

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