hydraulics.

The use or study of liquids to transmit force or control movement.

Use it for

Words that belong together

• aircraft hydraulics
• hydraulic-system maintenance

On the page

A leak disabled the aircraft's hydraulics.

Usage notes

Primary category: sci-fi. Forms: Usually uncountable; no ordinary plural in this sense. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: description, technology. Commonness: moderately common.