Definition of "heterosocial"

At present, there is a clear need for controlled studies of the effectiveness of treatment procedures with clinical populations of college students experiencing heterosocial problems […]

1979, Research and Practice in Social Skills Training, page 176

In practice, however, the line between heterosocial and heterosexual relationships is rarely seen as rigid and impenetrable. Instead, male-female friendships are often seen — by others if not by the participants — as having sexual and romantic potential. In contrast, much social effort goes into maintaining the line between homosocial and homosexual relationships […]

2003, Barbara J. Bank, Contradictions in Women's Education, page 111