  Combining neutrino mass generation and a dark matter candidate in a unified
model has always been intriguing. We revisit the class of R$\nu$MDM models,
which incorporate minimal dark matter in radiative neutrino mass models based
on the one-loop ultraviolet completions of the Weinberg operator. The
possibility of an exact accidental $Z_2$ is completely ruled out in this
scenario. We study the phenomenology of one of the models with an approximate
$Z_2$ symmetry. In addition to the Standard Model particles, it contains two
real scalar quintuplets, one vector- like quadruplet fermion and a fermionic
quintuplet. The neutral component of the fermionic quintuplet serves as a good
dark matter candidate which can be tested by the future direct and indirect
detection experiments. The constraints from flavor physics and
electroweak-scale naturalness are also discussed.
