a lens or system of lenses designed to be free of astigmatism
Word origin
C19 from an- + astigmatic
anastigmat in American English
(ænˈæstɪgˌmæt)
noun
an anastigmatic lens
anastigmat in American English
(əˈnæstɪɡˌmæt, ˌænəˈstɪɡmæt)
noun
Optics
a compound lens corrected for the aberrations of astigmatism and curvature of field
Word origin
[1885–90; ‹ G, back formation from anastigmatischanastigmatic]This word is first recorded in the period 1885–90. Other words that entered Englishat around the same time include: classified, reactor, scrum, toner, upsweep