Moiety

n. half, one of the two parts into which a whole is divided

Moiety (plural moieties) may mean:In chemistry, a functional group, or part of a moleculeIn anthropology, a type of descent groupIn Australian Aboriginal kinship, a skin groupIn real estate, a half interest in a propertyIn the 1997 computer game Riven, Moiety was the name of a group that rebelled against Gehn.
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Noun
1. one of two (approximately) equal parts
(synonym) mediety
(hypernym) one-half, half
2. one of two basic subdivisions of a tribe
(hypernym) social group
(member-holonym) tribe, folk

(a.)
One of two equal parts; a half; as, a moiety of an estate, of goods, or of profits; the moiety of a jury, or of a nation.
  

(a.)
An indefinite part; a small part.
  

Half of something. For example, it can be said that joint tenants hold a moiety in property. - (read more on Moiety)