APLANATIC

aplanatic

(adjective) free from or corrected for spherical aberration; “an aplanatic mirror”

Source: WordNet® 3.1


Adjective

aplanatic (comparative more aplanatic, superlative most aplanatic)

(optics, of an optical system) Free from, or corrected for, spherical aberration and chromatic aberration

Anagrams

• antapical

Source: Wiktionary


Ap`la*nat"ic, a. Etym: [Gr. (Opt.)

Definition: Having two or more parts of different curvatures, so combined as to remove spherical aberration; -- said of a lens. Aplanatic focus of a lens (Opt.), the point or focus from which rays diverging pass the lens without spherical aberration. In certain forms of lenses there are two such foci; and it is by taking advantage of this fact that the best aplanatic object glasses of microscopes are constructed.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

6 June 2025

PUNGENCY

(noun) wit having a sharp and caustic quality; “he commented with typical pungency”; “the bite of satire”


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Coffee Trivia

According to Guinness World Records, on 25 September 2016, the Birla Institute of Management Technology (India) in Uttar Pradesh, India, constructed the largest coffee cups pyramid consisting of 23,821 cups. They used paper takeaway coffee cups to build the pyramid.

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