post-synchronization

[ pohst-sing-kruh-nuh-zey-shuh n ]
/ ˌpoʊst sɪŋ krə nəˈzeɪ ʃən /

noun Movies, Television.

the recording of dialogue and sound effects in synchronization with the picture after the film has been shot.
Also called post-looping.

Origin of post-synchronization

First recorded in 1930–35