stigma
     n 1: the apical end of the style where deposited pollen enters
          the pistil
     2: a symbol of disgrace or infamy; "And the Lord set a mark
        upon Cain"--Genesis [syn: {mark}, {brand}, {stain}]
     3: an external tracheal aperture in a terrestrial arthropod
     4: a skin lesion that is a diagnostic sign of some disease
     [also: {stigmata} (pl)]
Source: WordNet® 2.0