sphere

sphere is a topic covered in the Taber's Medical Dictionary.

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(sfēr)

[L. sphaera, sphera, globe fr. Gr. sphaira, a ball]

1. A ball or globelike structure.
2. The power of a corrective lens to correct nearsighted or farsighted refractive defects. Sphere is measured in diopters.
SYN: SEE: optometric sphere

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