noun, feminine/ˈdjobtɾa/plural: dioptras
dioptra is feminine in Spanish.
a type of alidade
Borrowed from Latin dioptra, from Ancient Greek διόπτρα (dióptra).
/ˈdjobtɾa/
dioptra is feminine in Spanish.
a type of alidade
Borrowed from Latin dioptra, from Ancient Greek διόπτρα (dióptra).