“A traditional term for a VERBAL NOUN, in English a word ending in –ing: visiting in They appreciate my visiting their parents regularly. Like a noun, it can be introduced by the genitive my (compare I visit their parents). Some object to the non-genitive usage and avoid at least for names and pronouns, preferring They appreciate Bill’s visiting their parents to They appreciate Bill visiting their parents and They appreciate my visiting their parents to They appreciate me visiting their parents.”
Excerpted from: McArthur, Tom. The Oxford Concise Companion to the English Language. New York: Oxford University Press, 2005.