Definition: An insufficient quantity of some substance (as in dietary deficiency or hemoglobin deficiency in marrow aplasia), organization (as in mental deficiency), activity (as in enzyme deficiency or reduced oxygen-carrying capacity of the blood), etc., of which the amount present is of normal quality.
[L. deficio, to fail, fr. facio, to do]
See Also: deficiency disease
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Examples: glitazone, GI cocktail, etc.