A Spanish word derived from the Arabic “al-thumn,” meaning “an eighth part.” It is usually an eighth of a cántara.
In Colombia and Panama, 20ᵗʰ century, a unit of liquid capacity, approximately 2.02 liters (about 2.13 U.S. liquid quarts).
United Nations, 1966.
In Ifni and Spain, ? – 20ᵗʰ century, a
unit of liquid capacity, approximately 2.0166 liters (about 2.13
U.S. liquid quarts).¹
An official publication of 1886 gives a much larger
value for the province of Valencia, for a measure of oil, an fourth of an
arroba, about 2.99 liters.²
1. United Nations, 1966.
2. Dirección General del Instituto Geográfico y Estadístico.
Equivalencias entre las Pesas y Medidas Usadas Antiguamente en las Diversas
Provincias de España y las Legales del Sistema Métrico-Decimal.
Publicadas de Real Orden.
Madrid: Imprenta de la Dirección General del Instituto Geográfica y Estadístico,
1886.
Page 52. Calculated from the equivalent given for the "litro de aceite".
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Last revised: 12 May 2009.