moi|e|ty «MOY uh tee», noun, plural -ties.
1. half: »
War, pestilence, and famine had consumed…the moiety of the human species (Edward Gibbon).
2. part: »
Only a small moiety of college students win scholarships.
3. a person's share or portion.
4. Anthropology. each of the two strictly comparable major sections of a single society. Typically, as common among Australian aborigines, each moiety is exogamous so that all the members of any one moiety must find their spouses in the other.
5. Chemistry. a part of a molecule.
Useful english dictionary. 2012.