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  1. thymus

    • IPA[ˈθʌɪməs]

    英式

    • n.
      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.
    • noun: thymus, plural noun: thymi

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    • IPA[ˈTHīməs]

    美式

    • n.
      a lymphoid organ situated in the neck of vertebrates that produces T cells for the immune ...

    Oxford American Dictionary