endogamy
noun
- practice of marrying within a specific ethnic group, class, or social group
Wiktionary
Pronunciation: /ɛnˈdɒɡəmi/
noun
Etymology: From endo- + -gamy; compare inmarriage.
- The practice of marrying or requiring to marry within one's own ethnic, religious, or social group.
“In the Suppliant Maidens the heroines seem to protest against endogamy, which prohibits marriage except between persons of the same blood or stock.”
“Far from suggesting a demoralized culture, endogamy here seemed the mark of a buoyantly confident group, settled in their skin and not needing outsiders.”
- The fusion of two related gametes.