BIOLOGICAL FAMILY By N., Pam M.S. - April 7, 2013 A person's relatives that are related to them by blood and not marriage, adoption. See affinity. BIOLOGICAL FAMILY: "Joe's biological family included 3 brothers and 2 sisters and many cousins." Related Psychology Terms BIOLOGICAL FAMILY ARRANGED MARRIAGE RELATIONSHIP SYSTEM INTERMARRIAGE SELF-EXTENSION CONCURRENT THERAPY KINSHIP CARDIOVASCULAR (CV) TANDEM THERAPY SIB-PAIR METHOD Cite this page: N., Pam M.S., "BIOLOGICAL FAMILY," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/biological-family-2/ (accessed September 24, 2021).