dioptra

== English == === Noun === dioptra Alternative form of diopter. === Anagrams === parotid, partido == Spanish == === Etymology === Borrowed from Latin dioptra, from Ancient Greek διόπτρα (dióptra). === Pronunciation === IPA(key): /ˈdjobtɾa/ [ˈd̪joβ̞.t̪ɾa] Rhymes: -obtɾa Syllabification: diop‧tra === Noun === dioptra f (plural dioptras) (astronomy, topography) a type of alidade [from mid-16th c.] === Further reading === “dioptra”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025 “dioptra”, in Diccionario histórico de la lengua española [Historical Dictionary of the Spanish Language] (in Spanish), 3rd edition, Royal Spanish Academy [Spanish: Real Academia Española], 25 June 2025, →ISSN