diverging meniscus (medicine) and unswear (iou)

diverging meniscus (medicine)

diverging meniscus

A convexoconcave lens in which the power of the concavity exceeds that of the convexity.

Synonym: negative meniscus.

unswear (iou)

unswear verb trans. & intrans. . L16.
[from UN-2 + SWEAR verb.]
Retract (something sworn or asserted).

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