| Definition of 'thymus gland' |
Princeton's WordNet |
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1. (noun) thymus gland, thymus
a ductless glandular organ at the base of the neck that produces lymphocytes and aids in producing immunity; atrophies with age
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| Definition of 'thymus gland' |
U.S. National Library of Medicine |
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1. thymus gland
A single, unpaired primary lymphoid organ situated in the MEDIASTINUM, extending superiorly into the neck to the lower edge of the THYROID GLAND and inferiorly to the fourth costal cartilage. It is necessary for normal development of immunologic function early in life. By puberty, it begins to involute and much of the tissue is replaced by fat.
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Definitions of thymus gland 
