(Plural, arrateis.) The word is from the Arabic unit, the ratl.
In the Cape Verde Islands, 20th century, a unit of mass, approximately 459 grams (approximately 1.012 pounds avoirdupois).
United Nations, 1966.
In Portugal, at least as early as the 15th century – , a unit of mass,
In Bolivia, a unit of mass, another name for the libra, about 0.46 kilograms.
Technical Factors..., 1972, page 103.
Libre 100 di Firenze fanno .... in Lisbona lib. 42½, o vuol dire ratti 85 1/3.
One hundred Florentine libbre makes 42½ liber in Lisbon, or one may say 85 1/3 arratels.
Chiarini, 1481, as quoted in Borlandi, pages 17 & 18.
Assuming a 15th-century Florentine libbra of 339.5 grams makes the arratel 397.8 grams.
Lisbona ae uno peso che si chiama ratti, che due sono libb. una, e 16 lib. sono una roba, e 4 robe sono uno cantaro di Pisa.
Lisbon has a weight which they call the arratel, 2 of which are 1 libra, and 16 libre are 1 arroba, and 4 arroba are 1 cantaro of Pisa.
Uzzano, chapter 64, page 176.
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Last revised: 20 December 2005.