Share this entry
thymus Line breaks: thy¦mus
Pronunciation: /ˈθʌɪməs/
(also thymus gland)

Definition of thymus in English:

noun (plural thymi ˈθʌɪmʌɪ)

A lymphoid organ situated in the neck of vertebrates which produces T-lymphocytes for the immune system. The human thymus becomes much smaller at the approach of puberty.
Example sentences
  • Primary lymphoid organs in the thymus and bone marrow constitute the major site of lymphocyte development.
  • The lymphatic system consists of lymph nodes and vessels, the thymus, spleen and bone marrow.
  • About 10% of patients have a benign tumor of the thymus gland, a lymph gland that usually disappears at puberty.


Late 16th century (denoting a growth or tumour resembling a bud): from Greek thumos 'excrescence like a thyme bud, thymus gland'.

Words that rhyme with thymus

Mimas, primus, timeous
Definition of thymus in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove adverts and access premium resources