terra alba

1. 1.

   A white earthy substance consisting of burnt gypsum and aluminium silicate (kaolin), or some similar ingredient, such as magnesia. It is sometimes used to adulterate certain foods, spices, candies, paints, etc.

   一种白色土状物质,由烧石膏和硅酸铝(高岭土)或类似成分(如氧化镁)组成,有时用于掺假某些食品、香料、糖果、油漆等

白土(通常指白陶土；有时指石膏、枯矾、氧化镁、硫酸钡)