[bi.cy.cle] n [F, fr. bi- + -cycle (as in tricycle)] (1868): a vehicle with two wheels tandem, a steering handle, a saddle seat, and pedals by which it is propelled; also: a stationary exercise machine that resembles such a vehicle
[2]bicycle vi bi.cy.cled ; bi.cy.cling (1869): to ride a bicycle -- bi.cy.cler n -- bi.cy.clist n