  Bivariate Griffiths polynomials of Racah type are constructed from univariate
Racah polynomials. The bispectral properties of the former are deduced from
simple properties of the latter. A duality relation and the orthogonality of
these polynomials are provided. The domain of validity for the indices and
variables of these polynomials is also determined. Particular limits on the
parameters entering the polynomials allow to define several Griffiths
polynomials of other types. One special limit connects them to the original
Griffiths polynomials (of Krawtchouk type). Finally, a connection with the $9j$
symbols is made.
