Source : Webster's Revised Unabridged Dictionary (1913)

Ambo \Am"bo\, n.; pl. {Ambos}. [LL. ambo, Gr. ?, any rising, a
   raised stage, pulpit: cf. F. ambon.]
   A large pulpit or reading desk, in the early Christian
   churches. --Gwilt.

Source : WordNet®

ambo
     n : a platform raised above the surrounding level to give
         prominence to the person on it [syn: {dais}, {podium}, {pulpit},
          {rostrum}, {stump}, {soapbox}]