\θˈa͡ɪməs], \θˈaɪməs], \θ_ˈaɪ_m_ə_s]\
Definitions of THYMUS
- 2006 - WordNet 3.0
- 2011 - English Dictionary Database
- 2010 - Medical Dictionary Database
- 1920 - A practical medical dictionary.
- 1898 - Warner's pocket medical dictionary of today.
- 1914 - Nuttall's Standard dictionary of the English language
- 1874 - Etymological and pronouncing dictionary of the English language
- 1920 - A dictionary of scientific terms.
- 1898 - American pocket medical dictionary
- 1916 - Appleton's medical dictionary
Sort: Oldest first
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.
By DataStellar Co., Ltd
1. A ductless gland located in the superior mediastinum and lower part of the neck; it is a structure of early life, reaching its maximum development at the end of the second year, and then gradually undergoing retrograde changes, being absent in the adult. It consists of two irregularly shaped, nearly entirely separated lobes, divided into a number of polyhedral lobules separated by septa from the enveloping sheath of the lobe. Each lobule consists of clusters of lymphoid follicles consisting of an outer cortical and an inner medullary portion. It is supplied by the inferior thyroid and internal mammary arteries, and its nerves are derived from the vagus and sympathetic. It supplies an internal secretion of undetermined nature and action. 2. The thymus of the calf or lamb is the sweetbread, called also the throat-sweetbread, the pancreas being the stomach-sweetbread.
By Stedman, Thomas Lathrop
By William R. Warner
By Nuttall, P.Austin.
By Stormonth, James, Phelp, P. H.
By Henderson, I. F.; Henderson, W. D.
By Willam Alexander Newman Dorland