  We present Atacama Large Millimeter/submillimeter Array (ALMA) line and
continuum observations at 1.2mm with ~0.3" resolution that uncover a
Keplerian-like disk around the forming O-type star AFGL 4176. The continuum
emission from the disk at 1.21 mm (source mm1) has a deconvolved size of
870+/-110 AU x 330+/-300 AU and arises from a structure ~8 M_sun in mass,
calculated assuming a dust temperature of 190 K. The first-moment maps,
pixel-to-pixel line modeling, assuming local thermodynamic equilibrium (LTE),
and position-velocity diagrams of the CH3CN J=13-12 K-line emission all show a
velocity gradient along the major axis of the source, coupled with an increase
in velocity at small radii, consistent with Keplerian-like rotation. The LTE
line modeling shows that where CH3CN J=13-12 is excited, the temperatures in
the disk range from ~70 to at least 300 K and that the H2 column density peaks
at 2.8x10^24 cm^-2. In addition, we present Atacama Pathfinder Experiment
(APEX) 12CO observations which show a large-scale outflow from AFGL 4176
perpendicular to the major axis of mm1, supporting the disk interpretation.
Finally, we present a radiative transfer model of a Keplerian disk surrounding
an O7 star, with a disk mass and radius of 12 M_sun and 2000 AU, that
reproduces the line and continuum data, further supporting our conclusion that
our observations have uncovered a Keplerian disk around an O-type star.
