Impurities [noun]

The veins are mostly, especially in the lower cuttings, more free from impurities than those of Coleraine.

Due allowance must therefore be made for such impurities which are sometimes present in very large quantity.

Fortunately, childhood is protected by a resisting candour, by an enamel over which all impurities glide.

Remove all the impurities from the surface of the zinc when it is melted, with a metal spoon or piece of tin.

It is a fact that the injurious effects are in the acetanilid itself and not in the impurities it may occasionally contain.

Neither is it true that much of the injurious effect attributed to this drug is entirely traceable to these impurities.

Boiling water for ten minutes or longer will render it safe from all organic impurities.

The odor of a poorly ventilated room is due to organic impurities given off with the carbon dioxide.

Heated air rises, carrying with it much of the carbon dioxide and other impurities.

In these glands some impurities appear to be removed and colorless corpuscles made.