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Definition of thymus

thymus

/ˈθaɪ.məs/
thy · mus
Plural:thymuses
•
Adjective:thymic
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thymus Lexical Profile

thymus Game Scores & Validity

• noun

1

Any of various low-growing, aromatic perennial herbs and subshrubs of the genus Thymus (mint family Lamiaceae), native to temperate regions of Europe, North Africa, and Asia, cultivated for their fragrant leaves and dense clusters of small tubular pink, purple, or white blossoms.

2

A specialized primary lymphoid organ of the immune system located in the upper anterior chest behind the sternum, where T-lymphocytes mature and multiply, reaching its largest relative size during childhood before gradually regressing after puberty.

Example

"During infancy and early childhood, the thymus plays a vital role in training white blood cells to fight off infections."

Synonyms
View all synonyms for thymus

• Rhymes for thymus

• Nearby Words

thylacine
thyme
thymophylla
thymus
thyroid
thyself
ti

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Thymus. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/thymus
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