accrēteˈ intransitive verb

1. To grow together
2. To become attached

1. To unite
2. To form or gather round itself

accrēˈtion noun

1. Continued growth, esp as a result of a gradual accumulation of layers
2. The growing together of parts that are usually separate
3. Something which has grown in such a way
4. An extraneous addition

accrēˈtive adjective

accretion disc noun (astronomy)

A flat disc formed by matter in orbit around a celestial body