(chemistry) Any one of the simplest chemical substances that cannot be decomposed in a chemical reaction. Chemical elements consist of atoms which have the same number of protons.

(idiomatic) Effort or hard work, especially physical work involving repeated motion of the forearm, such as scrubbing.

An electoral register.

(Britain) A list of all those people who are registered to vote in a particular locality

A special election held to fill a political office that has become vacant between general elections.

The elder; a shrub or tree of the genus Sambucus. / The small, edible, purplish-black fruit of this plant, used in cooking and to flavour drinks etc.

A guitar which requires electronic amplification to produce sufficient sound.

(chemistry, physics) the potential difference of a half-reaction which occurs across a reversible cell made up of any electrode and a standard hydrogen electrode

(chemistry, physics) an electrode with a stable and accurately known electrode potential

(physics, chemistry) An electrode with a standard electrode potential of zero; used as a standard against which other electrodes are measured.