Bicycle motocross
a bicycle race over a rough cross-country course, usually consisting of jumps, obstacles, and turns.
abbreviation: bmx.
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cycling (def 2). the act or sport of riding or traveling by bicycle, motorcycle, etc. also called bicycle race, bicycle racing. sports. a race on lightweight bicycles with low handlebars, conducted for specified distances or against time on a dirt or board track or over public roads between cities.
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consisting of or having two cycles or circles. botany. in two whorls, as the stamens of a flower. pertaining to or resembling a bicycle. adjective of, forming, or formed by two circles, cycles, etc (of stamens, petals, etc) arranged in two whorls (of a chemical compound) having atoms arranged in two rings fused together with […]
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having two auricles or earlike parts. adjective having two auricles or earlike parts