concatenation

(n) the state of being linked together as in a chain; union in a linked series
(n) the linking together of a consecutive series of symbols or events or ideas etc
- it was caused by an improbable concatenation of circumstances
(n) a series of things depending on each other as if linked together
- the chain of command
- a complicated concatenation of circumstances
chain,
(n) the act of linking together as in a series or chain

chain