an instrumentality needed for an undertaking or to perform a service

a simple device used commonly in laboratories to mix small vials of liquid.

a device used in chemical laboratories for the efficient and gentle removal of solvents from samples by evaporation.

A salt bridge, in electrochemistry, is a laboratory device used to connect the oxidation and reduction half-cells of a galvanic cell (voltaic cell), a type of electrochemical cell.

a squeeze bottle with a nozzle, used to rinse various pieces of laboratory glassware, such as test tubes and round bottom flasks; made up of polyethylene, or glass.

a piece of laboratory equipment, driven by a motor, which spins liquid samples at high speed.