microdatanoun [ U or plural ]
uk/ˈmaɪ.krəʊˌdeɪ.tə//ˈmaɪ.kroʊˌdeɪ.t̬ə/specialized social science, finance & economics detailed information about particular people, families, etc. who were part of a general survey (= an examination of opinions, behaviour, etc.):
This microdata file contains household information for a representative sample of almost 40,000 families and individuals.