(uncountable) The condition of being hydraulic / (countable) The capacity of a cement to harden under water

Pertaining to water. / Related to, or operated by, hydraulics.

(transitive) To mine using the technique of hydraulic mining.

The engineering science that deals with practical applications where liquid is in motion and transmits energy. / The hydraulic system of a vehicle or other machine.

Using hydraulics.

Archaic form of hydraulic.

plural of hydraulicity

(oil industry) A technique in which a mixture of water and sand is forced down an oil well (or similar) in order to create fractures in the oil-bearing rock and thus release more oil.

(hydraulics, surface science) For a porous material, the ratio of porosity (ratio of volume of interstitial space filled with fluid to volume of material) to specific surface area (ratio of surface area in contact with fluid to volume of material); for a pipe or channel, the ratio of cross-sectional area to wetted perimeter.

(geology) A material property (e.g., for rocks or soil) that describes the rate which water can flow through pore spaces or fractures. SI units: m/s. Symbol: K.