n.; pl.Deficiencies [ See Deficient. ] The state of being deficient; inadequacy; want; failure; imperfection; shortcoming; defect. “A deficiency of blood.” Arbuthnot. [ 1913 Webster ]
[ Marlborough ] was so miserably ignorant, that his deficiencies made him the ridicule of his contemporaries. Buckle. [ 1913 Webster ]
Deficiency of a curve (Geom.), the amount by which the number of double points on a curve is short of the maximum for curves of the same degree. [ 1913 Webster ]