Definitions from Wiktionary (Dioptra)
▸ noun: Alternative form of diopter [A unit of measure of the power of a lens or mirror, equal to the reciprocal of its focal length in meters. Myopia is diagnosed and measured in diopters.]
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▸ noun: Alternative form of diopter [A unit of measure of the power of a lens or mirror, equal to the reciprocal of its focal length in meters. Myopia is diagnosed and measured in diopters.]
Similar:
dioptre,
dioptry,
diopter,
dioptometer,
optical power,
vertometer,
opsiometer,
auxetometer,
optometer,
phakometer,
more...
Opposite:
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▸ Words that often appear near dioptra
▸ Rhymes of dioptra
▸ Invented words related to dioptra