B2 any basic substance that is used in or produced by a reaction involving changes to atoms or molecules: The government has pledged to reduce the amount of chemicals used in food production. Each year, factories release millions of tons of toxic (= poisonous) chemicals into the atmosphere. More examples.
Queso blanco is traditionally made from cow's milk, whereas queso fresco may be made from a combination of cow's and goat's milk. They may both be eaten straight or mixed in with various dishes. Some versions of these cheeses, such as Queso Oaxaca, melt well when heated, but most only soften.
The two types of fresco painting are buon fresco and fresco secco. Buon fresco is painting into wet plaster, which makes a painting last a long time. Fresco secco is painting â¦ onto dry plaster, which does not last as long.