DictionarymediumTransmitting substance
noun

medium

A surrounding substance through which activity takes place.

Air is the medium through which sound reaches our ears.

Etymology

Latin medium means something in the middle or an intermediary. A surrounding medium occupies the space through which an action, signal, or process takes place.

More examples

  • The bacteria grow in a nutrient-rich medium.
  • Light bends as it passes between different media.
  • She uses radio as a medium for sharing local stories.

Forms

medium · media · mediums

Similar words

substance
Names the material itself, without emphasizing what passes through it.
environment
Emphasizes surrounding conditions rather than a material that transmits something.
channel
Emphasizes a route for transmission rather than the surrounding material.