diopter, dioptre
(noun) 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
Source: WordNet® 3.1
diopter (plural diopters)
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.
The dioptre adjustment mechanism of a pair of binoculars.
(obsolete) Any lens system, such as a telescope.
(obsolete) A theodolite or similar surveyor’s angle measuring device.
(obsolete) An alidade.
(obsolete) A surgical speculum.
(obsolete) An instrument for drawing the skull by projections.
• dioptre, peridot, periodt, proetid, proteid, protide, pterido-, pteroid, reptoid
Source: Wiktionary
Di*op"ter, Di*op"tra, n. Etym: [L. dioptra, fr. Gr. Dioptric.]
Definition: An optical instrument, invented by Hipparchus, for taking altitudes, leveling, etc.
Source: Webster’s Unabridged Dictionary 1913 Edition
1 April 2025
(adverb) at the present or from now on; usually used with a negative; “Alice doesn’t live here anymore”; “the children promised not to quarrel any more”
Espresso is both a coffee beverage and a brewing method that originated in Italy. When making an espresso, a small amount of nearly boiling water under pressure forces through finely-ground coffee beans. It has more caffeine per unit volume than most coffee beverages. Its smaller serving size will take three shots to equal a mug of standard brewed coffee.
