Other forms: cloning; clones; cloned
A clone is an organism that's genetically identical to another organism. The clone of a sheep has the exact same DNA as the original sheep.
While most people are fascinated with the idea of identical clones of animals — or even humans — it's much more common for a biologist to create clones of individual cells or molecules for experimental and other scientific uses. You can also describe someone as a clone if they act or look uncannily like another person: "Your cousin is totally your clone." The word clone was first used in botany, the science of plants, from the Greek klon, "twig."