the thin layer of air adjacent to the earth’s surface, usually considered to be less than 300 feet (91 meters) high.
the atmospheric layer extending up to about 600 m, in which the aerodynamic effects of surface friction are appreciable
[frik-shuh n] /ˈfrɪk ʃən/ noun 1. surface resistance to relative motion, as of a body sliding or rolling. 2. the rubbing of the surface of one body against that of another. 3. dissension or conflict between persons, nations, etc., because of differing ideas, wishes, etc. /ˈfrɪkʃən/ noun 1. a resistance encountered when one body moves […]
noun 1. a kind of match tipped with a compound that ignites by friction. noun 1. a match that ignites as a result of the heat produced by friction when it is struck on a rough surface See also safety match
noun, Engineering, Building Trades. 1. a pile depending on the friction of surrounding earth for support.
- Friction rub
noun 1. (med) the sound, heard through a stethoscope, made by the rubbing together of the two inflamed layers of pericardium in patients with pericarditis or of pleura in patients with pleurisy