Word Study
Index
: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9
[2x]
: 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
Table of Contents
POS
HYPHEN
OXFORD DICTIONARY
dionysius the elder | dionysus | dioon | diophantus | diopter | dioptre | dior | diorama | diorite | dioscorea | dioscorea alata

dioptre

 : 
Noun
 : 
di=op=tre

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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