Unicycle

['juːnɪsaɪk(ə)l] or ['junɪsaɪkl]

解释:

(noun.) a vehicle with a single wheel that is driven by pedals.

(verb.) ride a unicycle.

埃莉诺校对--From WordNet

解释:

n. an acrobat's cycle having but one wheel.

安吉拉校对