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