The term used for transfer of pollen grains from anther of one plant to the stigma of a different plant which, brings genetically differnt types of pollen grains to stigma, is:
Xenogamy
Geitonogamy
Chasmogamy
Transfer of pollen grains from the anther to the stigma of same flower is known as autogamy or self pollination.
Geitonogamy is transfer of pollens from anther of one flower to stigma of another flower of the same plant
Xenogamy is the transfer of pollen grains from the anther to the stigma of a different plant.