ACID n.
One of a class of compounds, generally but not always distinguished by their sour taste, solubility in water, and reddening of vegetable blue or violet colors. They are also characterized by the power of destroying the distinctive properties of alkalies or bases, combining with them to form salts, at the same time losi…
AGE n.
A particular period of time in history, as distinguished from others; as, the golden age, the age of Pericles. "The spirit of the age." Prescott. Truth, in some age or other, will find her witness. Milton. Archeological ages are designated as three: The Stone age (the early and the later stone age, called paleolithic a…
ALKALI SOIL n.
potash, and usually a little lime and magnesia. Two main classes of alkali are commonly distinguished: black alkali, which may be any alkaline carbonate, but which practically consists of sodium carbonate (sal soda), which is highly corrosive and destructive to vegetation; and white alkali, characterized by the prese…