A deficiency is generally a lack of something. It may also refer to:
*A
deficient number, in mathematics, a number ''n'' for which ''σ''(''n'') < 2''n''
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Angular deficiency, in geometry, the difference between a sum of angles and the corresponding sum in a Euclidean plane
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Deficiency (graph theory)
Deficiency is a concept in graph theory that is used to refine various theorems related to perfect matching in graphs, such as Hall's marriage theorem. This was first studied by Øystein Ore. A related property is surplus.
Definition of deficienc ...
, a property describing how far a given graph is from having a perfect matching
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Deficiency (medicine)
In medicine, a deficiency is a lack or shortage of a functional entity, by less than normal or necessary supply or function.TheFreeDictionary > deficiency Citing:
*Dorland's Medical Dictionary for Health Consumers. © 2007
* Miller-Keane Encycloped ...
, including various types of malnutrition, as well as genetic diseases caused by deficiencies of endogenously produced proteins
*A deficiency in
construction
Construction is a general term meaning the art and science to form objects, systems, or organizations,"Construction" def. 1.a. 1.b. and 1.c. ''Oxford English Dictionary'' Second Edition on CD-ROM (v. 4.0) Oxford University Press 2009 and ...
, an item, or condition that is considered sub-standard, or below minimum expectations
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Genetic deletion
In genetics, a deletion (also called gene deletion, deficiency, or deletion mutation) (sign: Δ) is a mutation (a genetic aberration) in which a part of a chromosome or a sequence of DNA is left out during DNA replication. Any number of nucleoti ...
, in genetics, also called a deficiency
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deficiency judgment, in the law of real estate
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tax deficiency, an amount owed in taxes over and above what has been submitted in payment
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