say it: STIG-muh
stigma is a noun meaning "the apical end of the style where deposited pollen enters the pistil". It carries 4 recorded senses.
the apical end of the style where deposited pollen enters the pistil
an external tracheal aperture in a terrestrial arthropod
a skin lesion that is a diagnostic sign of some disease
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for stigma come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.