See Also: inefficacy(medicine)
inefficacy(dictionary)

inefficacy (iou)



inefficacy noun. E17.
[Late Latin inefficacia; later from IN-3 + EFFICACY.]
Lack of efficacy; inability to produce the desired effect.
R. L. Stevenson The usual inefficacy of the lamps, which..shed but a dying glimmer even while they burned.
Also ineffi'cacity noun (rare) E18.