WordUnscrambler Home
dioptres
We have found lemma(root) word of dioptres : dioptre.
Definitions
[dʌɪˈɒptə], (Noun)
Definitions:
- a unit of refractive power, which is equal to the reciprocal of the focal length (in metres) of a given lens
(e.g: vision corrected to within one dioptre of perfect sight)
Phrases:
Origin
:
late 16th century (originally as diopter, denoting an alidade): from French, from Latin dioptra, from Greek, from di- ‘through’ + optos ‘visible’. The term was used in the early 17th century to denote an ancient form of theodolite; the current sense dates from the late 19th century
Click here to see the free dictionary definition for dioptres
definition by Oxford Dictionaries