An insufficiency, especially of something essential to health.
Inadequacy or incompleteness.
The codimension of a linear system in the corresponding complete linear system.
The amount by which the number of double points on a curve is short of the maximum for curves of the same degree.
A person who is deficient.
Insufficient or inadequate in amount.
Lacking something essential; often construed with in.
Of a number n, Having the sum of divisors σ(n)<2n, or, equivalently, the sum of proper divisors (or aliquot sum) s(n).