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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

Etymology

Origin of aplanatic

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The aplanatic lenses Nos. 62-66 are also to be had with a moveable cover and ring adapting them for use as pocket lenses.

From Microscopes and Accessory Apparatus Catalogue No. 40 by Leitz, Ernst

Mr. Orguly Bolp's large painting, entitled "Embrocation," is an interesting experiment in the handling of aplanatic surfaces, in which the toxic determinants are harmonized by a sort of plastic meiosis with syncopated rhythms.

From Punch, or the London Charivari, Vol. 150, April 5, 1916 by Seaman, Owen, Sir

"Kipper on toast" is not nearly so rich in carbohydrates, calories and aplanatic amygdaloids as "Kipper meat."

From Punch, or the London Charivari, Volume 156, Jan. 15, 1919 by Various

The same with two aplanatic lenses after Steinheil, Magnification 10 and 20 diam.

From Microscopes and Accessory Apparatus Catalogue No. 40 by Leitz, Ernst

"Thank you; I have a pretty good one of my own," Tom answered, diving into one of his pockets and bringing to light a small but powerful reading glass with an aplanatic lens.

From The Young Engineers in Colorado Or, At Railwood Building in Earnest by Hancock, H. Irving (Harrie Irving)

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