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stigmatism

Today it means: Image-formation property of an optical system which focuses a single point source in object space into a single point in image space Full definition →

Ancient Greek στίγματος

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stigmatism · noun¹

Ancient Greek · derived fromστίγματος“point”
English todaystigmatism

Derived from Ancient Greek στίγματος (stígmatos, “point”) + -ism.

stigmatism · noun²

Rebracketing of astigmatism as a stigmatism.

stigmatism · noun³

Hypercorrect analysis of stigmatism as the nominal form of stigmatise (compare the verb baptise with the noun baptism)

Etymology from Wiktionary, CC BY-SA 4.0.