ACHROMATIC a.
rom 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 by the one is corrected by other…
ACID n.
e, 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 losing their own peculiar properties. They all contain hydrogen, united with a more negati…
ACKNOWLEDGMENT n. 2 definitions
The act of owning or recognized in a particular character or relationship; recognition as regards the existence, authority, truth, or genuineness. Immediately upon the acknowledgment of the Christian faith, the eunuch was baptized by Philip. Hooker.