  We report on a measurement of phi-meson production in Au+Au collisions at a
beam momentum of 11.7 A GeV/c by Experiment E917 at the AGS. The measurement
covers the midrapidity region 1.2 < y < 1.6. Transverse-mass spectra and the
rapidity distribution are presented as functions of centrality characterized by
the number of participant projectile nucleons. The yield of phi's per
participant projectile nucleon increases strongly in central collisions in a
manner similar to that observed for kaons.
