astigmat

Meanings

1. 1
   noun

   rare or technical: a person who has astigmatism

   The optician tested each astigmat to determine the correct cylindrical lens.

Formed from the stem of astigmatism or by shortening astigmatic. The family combines Greek a-, 'not,' with stigma, 'point or mark,' referring to an optical system that does not bring rays from one point to a single focus.

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