Lacking something essential; often construed with in.
Insufficient or inadequate in amount.
Of a number n, Having the sum of divisors σ(n)<2n, or, equivalently, the sum of proper divisors (or aliquot sum) s(n).
A person who is deficient.
Significant, hefty; beneficial.
Enjoying good health; well; free from disease or disorder.
Conducive to health.
Evincing health.