fusion

noun

1. an occurrence that involves the production of a union
2. the state of being combined into one body
3. the merging of adjacent sounds or syllables or words
4. a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
5. the combining of images from the two eyes to form a single visual percept
6. correction of an unstable part of the spine by joining two or more vertebrae; usually done surgically but sometimes done by traction or immobilization
7. the act of fusing (or melting) together