Merriam-Webster's Collegiate® Dictionary, 11th Edition
BIKE
I. noun
Etymology: Middle English
Date: 14th century
a nest of wild bees, wasps, or hornets, a crowd or swarm of people,
II. noun
Etymology: by shortening & alteration
Date: 1882
bicycle , motorcycle , motorbike , stationary bicycle ,
III. intransitive verb (biked; biking)
Date: 1895
to ride a bike