dioptra

dioptra

1. Alternative form of diopter.

• parotid, partido

Borrowed from Latin dioptra, from Ancient Greek διόπτρα (dióptra).

• IPA^(key): /ˈdjobtɾa/ [ˈd̪joβ̞.t̪ɾa]
• Rhymes: -obtɾa
• Syllabification: diop‧tra

dioptra f (plural dioptras)

1. (astronomy, topography) a type of alidade [from mid-16th c.]

• “dioptra”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8, Royal Spanish Academy [Spanish: Real Academia Española], 10 December 2024
• “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