The Collaborative International Dictionary of English v.0.48:

Radiotelephone \Ra`di*o*tel"e*phone\
   (r[=a]`d[i^]*[o^]*t[e^]l"[-e]*f[=o]n), n.
   A wireless telephone, in which the signal is conveyed by
   radio waves. -- Ra`di*o*te*leph"o*ny, n.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

radiotelephony
    n 1: telephony that uses transmission by radio rather than by
         wire [syn: radiotelephone, radiotelephony, wireless
         telephone]