Virolle (f)
(with) definite article: laProbably a "typo" of Virole; Referred to as (plural) "virolles loupes", the translation of which I was unable to find in reliable dictionaries [NB: Google translate: "magnifying ferrules"].
Ricros, André & Chavanon, Michel (Recherches en archives): Les facteurs de cabrette. In: Ricros (et al.): La cabrette… (2017), p.464 (plural).
ws (linguistics [➺ Dictionaries, &c.]): Spelling NOT found !