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Definitions

deficiency

[dih-fish-uhn-see] / dɪˈfɪʃ ən si /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A large trial found that vitamin D supplementation did not significantly reduce fracture risk in generally healthy midlife and older adults who were not selected for deficiency.

From Science Daily • Jun. 6, 2026

Iron should not be taken without confirmed deficiency unless advised by a healthcare professional.

From Science Daily • Jun. 6, 2026

Without enough B12, things can go wrong, sometimes seriously, especially if deficiency is not recognized and treated.

From Science Daily • May 27, 2026

A 2025 comprehensive review concluded that B12 deficiency remains a modifiable risk factor for neurological and cognitive problems, especially in high risk groups such as older adults and vegetarians.

From Science Daily • May 22, 2026

Something you should understand: I’m not androgynous in the least. 5-alpha-reductase deficiency syndrome allows for normal biosynthesis and peripheral action of testosterone, in utero, neona- tally, and at puberty.

From "Middlesex: A Novel" by Jeffrey Eugenides




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