Groups of people, usually consisting of parents (mothers and fathers) and children, who live together in a common dwelling and depend on one another for support.
The lawful mother and father of a person. Included are the natural mother or father of a child born to a valid marriage; the adoptive father or mother of a child jointly adopted by them; the natural mother of an illegitimate child if she is the sole guardian; the child's putative parent who has expressly acknowledged paternity and has contributed to the child's support; and any individual whose status as guardian of the child has been established by statute.
People who have the same parents and are related to one another as brothers and/or sisters.
The above terms and definitions are part of the Taxonomy of Human Services, used here by permission of INFO LINE of Los Angeles.