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
dioptre (plural dioptres)
Alternative spelling of diopter
• diopter, peridot, periodt, proetid, proteid, protide, pterido-, pteroid, reptoid
Source: Wiktionary
Di*op"tre, n. Etym: [F. See 2d Dioptric.] (Optics)
Definition: A unit employed by oculists in numbering glasses according to the metric system; a refractive power equal to that of a glass whose principal focal distance is one meter.
Source: Webster’s Unabridged Dictionary 1913 Edition
21 June 2025
(noun) the condition of being deprived of oxygen (as by having breathing stopped); “asphyxiation is sometimes used as a form of torture”
Coffee dates back to the 9th century. Goat herders in Ethiopia noticed their goats seem to be “dancing” after eating berries from a particular shrub. They reported it to the local monastery, and a monk made a drink out of it. The monk found out he felt energized and kept him awake at night. That’s how the first coffee drink was born.
