aspheric
adjective
aspher·ic
(ˌ)ā-ˈsfir-ik 
-ˈsfer-
variants
or aspherical
(ˌ)ā-ˈsfir-i-kəl
-ˈsfer-
: departing slightly from the spherical form especially in order to correct for spherical aberration
an aspheric lens
Examples of aspheric in a Sentence
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Specular highlights are thankfully free of the onion ring effect, a sign that Sigma has taken care to smooth out the surfaces of the four aspheric elements in the 17-40mm's complex 17-element/11-group optical formula.
—
PC Magazine, 17 July 2025
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PC Magazine, 17 July 2025
Cite this Entry
“Aspheric.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aspheric. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
aspheric
adjective
aspher·ic
(ˈ)ā-ˈsfi(ə)r-ik, -ˈsfer-
variants
or aspherical
: departing slightly from the spherical form especially in order to correct for spherical aberration
an aspheric lens
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