da·tum 
/ˈdeɪtəm, ˈdætəm/ noun
plural da·ta /ˈdeɪtəm, ˈdætəm/ noun /ˈdeɪtə, ˈdætə/ or da·tums [count] formal + technical : a single piece of information
▪ an important historical datum [=fact] usage data
▪ an important historical datum [=fact] usage data
