stigma

n 1: the apical end of the style where pollen is deposited

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

SIGMA

A scientific {visual programming} environment from NASA.

{(http://fi-www.arc.nasa.gov/fia/projects/sigma/)}