The distinctive point
avoirdupois ounce: a rule rather than an average
The matrix treats this value as exact because its recorded basis is defined. The interesting distinction is epistemic: a defined standard can be converted without an uncertainty band, while reconstructed ancient standards cannot inherit that certainty.
Basis: defined. Check the record source.
- smalleravoirdupois grain437.5 × avoirdupois grain
- largeravoirdupois pound1/16 of avoirdupois pound
What this unit was
avoirdupois ounce is modelled here as a weight standard of the Modern customary tradition, associated with International during International pound definition. The converter represents one oz as 28.349523 g; its basis is defined. This is a defined or exact matrix anchor.
Its present role is chiefly comparative: it provides a stable reference for trade, craft production, taxation, bullion, and sometimes coin accounting, rather than evidence that earlier cultures used a modern definition. Coin mass is not a monetary exchange rate.
Evidence of use and sources
The working value is traceable to NIST SI units: mass. Its record is classified as exact confidence and uses the stated basis rather than an assumed culture-wide constant.
The local library supplies contextual quotations; the linked record source remains authoritative for the modern definition.
“the ten millionth of the meridian quadrant ... be called a metre”
Standard measures of United States, Great Britain, and France, PDF p. 16. metric origin proposal
“A standard is a physical representation of a unit.”
A dictionary of weights and measures for the British Isles, PDF p. 31. standard versus unit
“the omission of necessary facts”
Standard measures of United States, Great Britain, and France, PDF p. 10. conditions required for comparison
Working definition
avoirdupois ounce is represented as a Modern customary standard associated with International during International pound definition.
The converter uses 28.34952313 g per unit.
How to use it
Basis: defined; confidence: exact. A shared historical name does not make this value portable to another period or polity.
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