(optics) A bright point that appears at the centre of a circular object's shadow due to Fresnel diffraction.

plural of Arago spot

Of, from, or pertaining to Aragon, the Aragonese people or the Aragonese language.

A person from Aragon.

The language of Aragon, nowadays only spoken as a mother tongue by a few thousand people in some valleys of the Pyrenees. / The Spanish language spoken in Aragon when influenced by Aragonese traits.

An autonomous community in northeastern Spain. Capital: Zaragoza. / A river in this part of Spain. / (historical) A medieval kingdom in Spain.

(mineralogy) An evaporite consisting of anhydrous calcium carbonate with the chemical formula CaCO₃; it is dimorphous with calcite.

(geology) Of, pertaining to, or formed from aragonite

The part of Aragon (Spain) where Catalan is spoken.

plural of aragonite