English Dictionary

thymus

/ˈθaɪməs/

noun

(anatomy, immunology) A ductless gland, consisting mainly of lymphatic tissue, located behind the top of the breastbone. It is most active during puberty, after which it shrinks in size. It plays an important role in the development of the immune system and produces lymphocytes.

The thymus is a small organ located in the upper chest.

意味（1）

(anatomy, immunology) A ductless gland, consisting mainly of lymphatic tissue, located behind the top of the breastbone. It is most active during puberty, after which it shrinks in size. It plays an important role in the development of the immune system and produces lymphocytes.

For a very long time the role of the thymus in the body was a complete mystery.