| 1. | a half. |
| 2. | an indefinite portion, part, or share. |
| 3. | Anthropology. one of two units into which a tribe or community is divided on the basis of unilineal descent. |

moiety moi·e·ty (moi'ĭ-tē)
n.
One of two or more parts into which something may be divided, such as the various parts of a vitamin or molecule.