noniuscommon nounSyllable DecompositionnoniusEtymologyexpandnonnius, Latinized name of Pedro Nuñez, a Portuguese mathematician of the 16th century.Definition1. Scale of certain mathematical instruments, formed of very small parts and giving divisions by the section of transversals, unlike the vernier, which gives them by the comparison of two systems of divisions, one of which has parts smaller than the other by one tenth.expandSynonymvernier