The average acceleration of gravity at the earth's surface, conventionally defined to be exactly 9.806 65 meters per second per second, or about 32.174 05 feet per second per second. The unit is popularly known as the g or gee
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}