u·niv·o·cal 
(y-nĭvə-kəl)
(y-nĭvə-kəl)adj.
Having only one meaning; unambiguous.
n.
A word or term having only one meaning.
[From Late Latin ūnivocus : Latin ūni-, uni- + Latin vocāre, to say; see wekw- in the Appendix of Indo-European roots.]
u·nivo·cal·ly adv.