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Wollaston's doublet

Noun CEFR B2

Definitions

A magnifying glass consisting of two planoconvex lenses, designed to correct spherical aberration and chromatic dispersion.

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
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See also

wollastonite Wollaton Wolle Wollemi Wollemi pine Wollenberg

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