Ancillary

That information is ancillary to our discussion.

You will be provided with all the ancillary materials you require.

The professor carefully prepared the materials for the lecture, down to the smallest ancillary page.

The observatory also possesses multiple smaller telescopes and ancillary equipment.

[…] how easily he took all things along with him,—the persons, the opinions, and the day, and nature became ancillary to a man.

[E]very organ of the body, whatever function it may perform, must also perform the other four functions in an ancillary manner.

The cafeteria is primarily used by students and staff (academic, administrative, and ancillary).

Auxiliaries and ancillaries are comprehensive, and include a Westinghouse motor-driven recriprocating compressor used for locomotive braking and general service air, two rotary exhauster sets for train brakes when hauling passenger or fitted freight trains, and an oil-fired train heating boiler.