View source for Uncia (unit)

{{Short description|Ancient Roman unit of length}}
{{Infobox unit
| bgcolor = 
| name = Roman inch
| image = 
| caption = 
| standard = [[Roman units of length|Roman]]
| quantity = [[length]]
| symbol = 𐆑 <!-- U+10191-->
| symbol2 = 
| namedafter = 
| extralabel = 
| extradata = 
| units1 = [[SI base unit]]s
| inunits1 = 24.6 [[millimetre|mm]]
| units2 = [[United States customary units|U.S. customary]]
| inunits2 = 0.97 [[inch|in]]
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| units6 = 
| inunits6 = 
| units_imp1 = 
| inunits_imp1 = 
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| units_imp6 = 
| inunits_imp6 =
| units_us1 = 
| inunits_us1 = 
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| units_us6 = 
| inunits_us6 = 
}}

The '''{{lang|la|uncia}}''' (plural: {{lang|la|unciae}}, lit. "''a twelfth''") was a [[Ancient Rome|Roman]] [[Roman units|unit]] of [[Roman units of length|length]], [[Roman units of weight|weight]], and [[Roman units of volume|volume]]. It survived as the [[Byzantine units|Byzantine liquid ounce]] ({{langx|grc|οὐγγία}}, ''oungía'') and the origin of the English [[inch (unit)|inch]], [[ounce]], and [[fluid ounce]].

The '''Roman inch''' was equal to {{frac|12}} of a [[Roman foot]] (''{{lang|la|pes}}''), which was standardized under [[Marcus Vipsanius Agrippa|Agrippa]] to about 0.97 [[inch (unit)|inches]] or 24.6 [[millimeter]]s.{{cn|date=April 2021}}

The '''Roman ounce''' was {{frac|12}} of a [[Roman pound]].<ref name=oz>{{Citation |title=Oxford English Dictionary, ''1st ed.'' |contribution=ounce, ''n.<sup>1</sup>'' |date=1911 |publisher=Oxford University Press |location=Oxford}}.</ref>

==See also==
* [[Ancient Roman weights and measures]]

==References==
{{Reflist|20em}}

[[Category:Units of length]]
[[Category:Human-based units of measurement]]
[[Category:Ancient Roman units of measurement]]


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