rađiophony

The production of sound by intermittent action of a beam of light upon a body. ra-di-o-scope, s. [Lat. radius =a ray, and Gr. skopeō -to see. Any instrument designed for conducting examinations of X-rays phenomena, such as the fluoroscope, skiaskope, etc. rā-di-o-scop-ic, a . [Eng. radio scop(e): -ic.] Pertaining or relating to the radioscope; made or determined by the aid of a radioscope. rā-di-os-cô-př, s. [Eng. radio scop(e); y.] The act or art of using a radioscope; investigation with a radioscope. IMG:content-0168.png:[blocks in formation] Chem.: An oil obtained by distilling the roots and seeds of the radish with water. ra-di-us ( pl. ra-di-i, ra-di-us-ěş), s. [Lat. =a ray, a rod, a spoke.] [RAY (1), 8.] arm. 1. Anat .: The outer of the two bones of the fore. It extends from the humerus to the carpus, and articulates with the humerus, the ulna, the scaphoid, and the semilunar bones. 2. Bot . ( pl .): The peduncles supporting the partial umbels in an umbellifer. 3. Fort.: A line drawn from the center of the polygon to the end of the outer side. 4. Geom .: The distance from the center of a circle to any point of the circumference. All radii of the same circle, or of equal circles, are equal. The radius of a sphere is half a diameter, or it is the distance from the center to any point of the surface. In the same, or equal spheres, all radii are equal. In trigonometry the radius is the whole sine, or sine of 90°. Radius of curvature of a curve at any point : The radius of the osculatory circle at that point. It is so called because its reciprocal is taken as the measure of the curvature at that point. radius-bar, radius-rod, s. Steam - engine : One of the guiding-rods in a parallel motion, jointed to the connecting links, to coun teract the vibratory motion communicated by the beam, by guiding the links so that the head of the piston-rod may reciprocate in a line sensibly straight. radius-vector ( pl . radii-vectores), s. 1. Astron .: An imaginary line joining the center of a heavenly body to that of any second one revolving around it. Used of the sun and any planet, of any planet and its satellites, . 2. Geom.: A straight line, or the length of such line, connecting any point, as of a curve, with a fixed point or pole, round which it revolves, and to which it serves to refer the succe ive points of curve in a system of polar coordinates. rā-dix, s. [Lat. a root.] †1. Alg .: The root of a finite expre ion from which a series is derived. 2. Anat.: The root or portion of anything inserted into another, as the root of a tooth. 3342 3. Bot .: The root of any plant. 4. Pharm.: The root of a medicinal plant, as Rhei radix =Rhubarb root. 5. Math .: Any number which is arbitrarily made the fundamental number or base of any system. Thus 10 is the radix of the decimal system of numeration, and also in Briggs' or the common system of logarithms. In Napier's system of logarithms it is 2-7182818284. All other numbers are considered as some powers or roots of the radix, the exponents of which powers or roots constitute the logarithms of those numbers respectively. [LOGARITHM.] 6. Philol .: A primitive word from which other words spring; a root, a radical. *rad-ne , *rad-ne e, s. [Eng. rad, a; -ne .] Terror, fright. ( Morte Arthure , 120.) ra-doub, s. [Fr.] Mercantile Law : The repairs made to a ship, and a fresh supply of furniture and victuals, munitions, and other provisions required for a voyage.