Meaning

noun the apical end of the style where deposited pollen enters the pistil

noun a symbol of disgrace or infamy; --Genesis

noun an external tracheal aperture in a terrestrial arthropod

originFrom Latin stigma, from Ancient Greek στίγμα (stígma, “mark of slavery or disgrace”), from στίζω (stízō, “to mark”). Closely related to stigme, and distantly related to stick.

Etymology from Wiktionary, CC BY-SA 3.0