Definition of thymus noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈθaɪməs//
; NAmE NAmE//ˈθaɪməs//
(also thymus gland) (anatomy)
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an organ in the neck that produces lymphocytes (= cells to fight infection) Word Originlate 16th cent. (denoting a growth or tumour resembling a bud): from Greek thumos ‘excrescence like a thyme bud, thymus gland’.
See the Oxford Advanced American Dictionary entry: thymus