Dictionary

noun

Definitions

1. A living organism (originally a plant) produced asexually from a single ancestor, to which it is genetically identical.

2. A group of identical cells derived from a single cell.http//www.medterms.com/script/main/art.asp?articlekey=2754

3. A copy or imitation of something already existing, especially when designed to simulate it.

4. Two people who are exactly alike, as far as looks or behavior.