parvior

• (Classical Latin) IPA^(key): [ˈpar.wi.ɔr]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈpar.vi.or]

From parvus (“small”) +‎ -ior (“-er”). A rare regularly formed alternative to the usually suppletive comparative form minor.

parvior (comparative, neuter parvius, adverb parvius); third declension (Late Latin, rare)

1. comparative degree of parvus:

   Synonym: minor

   Antonym: maior

   1. smaller

Third-declension comparative adjective.

• "parvior", in Charles du Fresne du Cange, Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• “parvior”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.