ABSTRACT a.
stract terms are the names of orders, genera or species of things, in which there is a combination of similar qualities. -- Abstract numbers (Math.), numbers used without application to things, as 6, 8, 10; but when applied to any thing, as 6 feet, 10 men, they become concrete. -- Abstract or Pure mathematics. See Ma…
ABYSSAL a.
one of the belts or zones into which Sir E. Forbes divides the bottom of the sea in describing its plants, animals, etc. It is the one furthest from the shore, embracing all beyond one hundred fathoms deep. Hence, abyssal animals, plants, etc.
ACHROMATIC a.
Uncolored; not absorbing color from a fluid; -- said of tissue. Achromatic lens (Opt.), a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced…
ACID n.
racterized by the power of destroying the distinctive properties of alkalies or bases, combining with them to form salts, at the same time losing their own peculiar properties. They all contain hydrogen, united with a more negative element or radical, either alone, or more generally with oxygen, and take their names fr…
ADJURE v.
To charge, bind, or command, solemnly, as if under oath, or under the penalty of a curse; to appeal to in the most solemn or impressive manner; to entreat earnestly. Joshua adjured them at that time, saying, Cursed be the man before the Lord, that riseth up and buildeth this city Jericho. Josh. vi. 26. The high priest…