onza [Spanish]

Like so many names of units, the onza derives from the Latin uncia.

For the Portuguese unit, see onça.

1

A unit of mass in Spain and South America, 20th century:

Chile A map showing the location of Chile., Cuba, Guatemala, Nicaragua, 
Peru, and Spain link to a table showing relationships between Spanish units of mass
approximately 28.750 grams (UN 1966)
Colombia = ¹⁄₁₆ libra = 31.25 grams (UN 1966)
Costa Rica

[Costa Rica. Ministerio de formento.]
Medidas y pesas del sistema métrico, y tablas de equivalencia con las antiguas.
San José de Costa Rica: Imprenta nacional, 1885.

= 28.7539 grams. The apothecary's onza was identical.

 

Dominican Republic = 1 ounce avoirdupois, approximately 28.35 grams (UN 1966)
Honduras (and see definition 2) 28.755 grams  (UN 1966)
Paraguay approximately 28.688 grams (UN 1966)
Mexico 28.775 grams (UN 1966)

2

In Spain, the onza also appears in apothecaries' weight, = ¹⁄₁₂ libra, about 28.8 grams. link to a chart showing relationships between units in Spanish apothecaries' weight

3

In Valencia, Spain, a unit of length = ¹⁄₁₂ pie = 1¹⁄₃ dedo.

Doursther, page 369.

4

In Spain, a unit of liquid capacity used for oil, = ¼ panilla, about 31.4 milliliters, weighing 28¾ grams.

In Galicia, Spain, it was a unit of liquid capacity for wine, = ¹⁄₁₃₆₀ cañada = ¹⁄₂₀ quartillo, about 29 milliliters.

Doursther, page 370.

5

In Honduras, a unit of liquid capacity, approximately 28.8 milliliters.

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