Unit of refractive power of a lens Crossword Clue
7 letters · New York Times · Sunday, August 24, 2003 · 9-Down
Appeared in 1 New York Times Crossword: Sunday, August 24, 2003.
Exact puzzle match · New York Times · August 24, 2003 · 9-Down · 7 letters
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What does this clue mean?
a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists
noun
WordNet® (Princeton University)
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