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: D D- D. Da Db Dc Dd De Df Dg Dh Di Dj Dk Dl Dm Dn Do Dp Dr Ds Dt Du Dv Dw Dy Dz

dionysius the elder | dionysus | dioon | diophantus | diopter | dioptre | dior | diorama | diorite | dioscorea | dioscorea alata

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HYPHEN
WORDNET DICTIONARY
OXFORD DICTIONARY

dioptre

:

Noun

:

di=op=tre

WORDNET DICTIONARY

Noun dioptre has 1 sense

dioptre(n = noun.quantity) diopter - 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; Array

is a kind of unit, unit of measurement

OXFORD DICTIONARY

dioptre, n. (US diopter) Optics a unit of refractive power of a lens, equal to the reciprocal of its focal length in metres.

Etymology

F dioptre f. L dioptra f. Gk dioptra: see DIOPTRIC

For further exploring for "dioptre" in Webster Dictionary Online

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