Electrolyt

Electrolyte is a substance that breaks up into ions (particles with electrical charges) when it is dissolved in water or body fluids. Some examples of ions are sodium, potassium, calcium, chloride, and phosphate. These ions help move nutrients into cells, help move waste out of cells, and help nerves, muscles, the heart, and the brain work the way they should.

An electrolyte is a chemical compound that dissociates into ions and hence is capable of transporting electric charge – i.e. an electrolyte is an electric conductor; unlike metals the flow of charge is not a flow of electrons, but is a movement of ions.
For example, the diagram shows a domestic battery being used to attract electrolyte ions to the electrodes of an electrochemical cell, where the ions gain electrons (are reduced) or lose electrons (are oxidized).
Sometimes the electrodes themselves react, for example a metal electrode could be oxidized and release ions into the electrolyte. Electrolytes can be solid, liquids, or solutions.

Sources:

National Cancer Institute https://www.cancer.gov/publications/dictionaries/

Chemicool Dictionary https://www.chemicool.com/definition/