Nonius can refer to:

People

• Romans belonging to the Nonia gens
• Pedro Nunes (Latin: Petrus Nonius) (1502–1578), Portuguese astronomer and mathematician

Other

• Nonius (horse), a breed of horse
• Nonius (device), a precursor to the Vernier scale
• Nonius (crater), a lunar crater

See also

• Nonus
• Nonnus

This disambiguation page lists articles associated with the title Nonius.
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