…opus (before a number given to each work of a particular composer, usually indicating the order of publication)…
…a newspaper page opposite the editorial page, devoted to personal comment, feature articles, etc.…
…a form of abstract art that gives the illusion of movement by the precise use of pattern and colour, or in which conflicting patterns emerge and overlap. Bridget Riley and Victor Vasarely are its most famous exponents…
…an amplifier with high gain and high input impedance (usually with external feedback), used especially in circuits for performing mathematical operations on an input voltage…
