noun

apparatus

ap-uh-RAT-us/ˌæpəˈrætəs/

An organized set of components serving a particular function.

The laboratory's apparatus separates the liquid into several different components.

A coordinated laboratory filtration apparatus: a funnel held by a clamp stand above a receiving flask, with a beaker beside it containing the liquid to be filtered.
Etymology

The pieces express making something ready. Latin used the resulting noun for preparation and equipment, giving English the idea of tools brought together for a particular purpose.

In context

Storytime Haven373:33
"This is an apparatus called an ondometer. It tells you the direction and something of the magnitude of the Hertzian waves used in wireless."
🕵️‍♂️ The Silent Bullet: A Craig Kennedy Mystery 🔍 | Arthur B. Reeve

More examples

  • The exercise requires a complicated piece of apparatus.
  • The party's political apparatus organized the entire campaign.
  • The diagram shows the body's respiratory apparatus.

Forms

apparatus · apparatuses

Similar words

equipment
Tools collectively, not necessarily organized into a functioning system.
machinery
Often mechanical equipment, though also used for organized institutions.