1828, "three-wheeled horse-drawn carriage," from Fr. tricycle (1827), from tri- + cycle. The pedal-powered version is first attested 1868. Short form trike (on the model of bike) is attested from 1883.
1819, "wheeled vehicle propelled by the feet on the ground," from Fr. vélocipède, from L. velox (gen. velocis) "swift" + pedem, acc. of pes "foot." Applied to an early kind of bicycle or tricycle in 1849.
1868, coined from bi- "two" + Gk. kyklos "circle, wheel" (see cycle), on the pattern of tricycle; both the word and the vehicle superseding earlier velocipede. Probably not from French, though often said to be. The assumption apparently is because Pierre Lallement, employee of a French carriage works, improved Macmillan's 1839 pedal velocipede in 1865 and took the invention to America. See also pennyfarthing.
"That ne plus ultra of snobbishness -- bicyclism." [1876]