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spheno-
sphenodon
sphenoid
sphenoid bone
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sphere
sphere of influence
spherical
spherical aberration
spherical angle
spherical coordinates
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spherical aberration

spher·i·cal ab·er·ra·tion (plural spher·i·cal ab·er·ra·tions)


noun 
Definition:
 
lens fault: a fault in a lens or curved mirror in which light passing through the edge has a different focal point from light passing through the center, resulting in blurred images

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