lesbianism

[lez-bee-uh-niz-uh m] /ˈlɛz bi əˌnɪz əm/
noun
1.
homosexual relations between women.
Origin
1865-70; Lesbian + -ism
Word Origin and History for lesbianism
n.

1870, from lesbian + -ism.

lesbianism in Medicine

lesbianism les·bi·an·ism (lěz'bē-ə-nĭz'əm)
n.
Sexual orientation of women to other women.