orographic
adjective
oro·graph·ic
| \ ˌȯr-ə-ˈgra-fik
\
\
variants:
or less commonly orographical \ ˌȯr-ə-ˈgra-fi-kəl
\
\
Definition of orographic
: of or relating to mountains
especially
: associated with or induced by the presence of mountains
orographic rainfall