n. 媒介, 手段, 机构

[法] 媒介, 工具, 手段

Instrumentality \In`stru*men*tal"i*ty\, n.; pl.
{Instrumentalities}.
The quality or condition of being instrumental; that which is
instrumental; anything used as a means; medium; agency.

The instrumentality of faith in justification. --Bp.
Burnet.

The discovery of gunpowder developed the science of
attack and defense in a new instrumentality. --J. H.
Newman.