bronchus-associated lymphoidtissue
bron·chus-as·so·ci·at·ed lym·phoidtis·sue
(BALT) (brong'kŭs-ă-sō'sē-ā-tĕd lim'foyd tish'ū)Patches of lymphoid tissues composed mainly of B and T lymphocytes and extending throughout the bronchial airways of the lung.