deficiency

de|fi|cien|cy /dɪf'ɪʃənsi/ (deficiencies)
1 [N-VAR] with supp
Deficiency in something, especially something that your body needs, is not having enough of it.
They did blood tests on him for signs of vitamin deficiency...
2 [N-VAR] with supp
A deficiency that someone or something has is a weakness or imperfection in them. (FORMAL)
...a serious deficiency in our air defence.
= weaknessac|quired im|mune de|fi|cien|cy syn|drome
[N-UNCOUNT]
Acquired immune deficiency syndrome is the same as AIDS.

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