In the 18th century, the Swedish government made coffee and its paraphernalia (including cups and dishes) illegal for its supposed ties to rebellious sentiment.
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
29 April 2024
(noun) a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate
In the 18th century, the Swedish government made coffee and its paraphernalia (including cups and dishes) illegal for its supposed ties to rebellious sentiment.