Metamorphosis (noun)

1. A transformation or change of form, especially one that is sudden and dramatic.
2. A process of change in the structure and organization of the body of an animal during its development.

Origin:

From greek μεταμόρφωσις (metamorphōsis, "transformation"), from μεταμορφόω (metamorphoō, "to transfor.m")

Examples:

1. The caterpillar's metamorphosis into a butterfly is one of the most dramatic changes in the animal kingdom.
2. The frog's metamorphosis from tadpole to adult is a gradual process.
3. The metamorphosis of the prince into a frog was a curse placed upon him.
4. The metamorphosis of the company from a small startup to a large corporation was impressive.
5. The metamorphosis was complete and the butterfly emerged from the chrysalis.