thymus

noun
UK /ˈθaɪməs/
US /ˈθaɪməs/

A small soft organ in your chest that helps your body fight germs when you are young.

The doctor explained that the thymus is most active during childhood.


OTHER MEANINGS

2. A genus of aromatic plants in the mint family, commonly known as thyme.

Thymus vulgaris is the scientific name for common garden thyme.

3. In anatomy, the thymus gland's tissue or its lobules considered collectively.

The surgeon removed a small portion of the thymus for testing.

4. A structure in certain invertebrates resembling the thymus of vertebrates.

Researchers compared the thymus-like tissue in the sea squirt to that of mammals.