thymus

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a ductless glandular organ at the base of the neck that produces lymphocytes and aids in producing immunity;
atrophies with age
• Syn:
thymus gland
• Hypernyms:
endocrine gland, endocrine, ductless gland
• Part Holonyms:
neck, cervix, immune system