Anode

ˈan-ˌōd

Meaning & Definition

noun
The electrode in an electrochemical cell at which oxidation occurs and electrons are emitted.
In the electrolysis of water, the oxygen is produced at the anode.
The positive electrode in a vacuum tube or semiconductor device, where current flows into the device.
The anode in the diode allows current to flow in only one direction.
The terminal of a battery or other voltage source that is connected to the positive side of the circuit.
Make sure to connect the positive wire to the anode of the battery.

Etymology

The word 'anode' derives from the Greek 'anodos', meaning 'way up', from 'ana-' (up) + 'hodos' (way).

Common Phrases and Expressions

sacrificial anode:
A type of anode used to protect other metal surfaces from corrosion.
anode ray:
A stream of positively charged particles produced from the anode.

Related Words

Slang Meanings

In electrical engineering contexts, sometimes used informally to refer to any positive charging point.
Just connect the wires to the anode, and you're good to go!