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aplanatic

American  
[ap-luh-nat-ik] / ˌæp ləˈnæt ɪk /

adjective

Optics.

  1. free from spherical aberration and coma.

aplanatic British  
/ ˌæpləˈnætɪk /

adjective

  1. (of a lens or mirror) free from spherical aberration

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Etymology

Origin of aplanatic

1785–95; a- 6 + Greek planá ( ein ) to wander + -tic. See planet

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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