self-balancing

/S EH1 L F B AE0 L AH0 N S IH0 NG/
adjective
  1. 1

    Able to right itself automatically to prevent falling.

    โ€œa self-balancing scooterโ€

  2. 2

    Of a data structure: able to maintain a small height (number of levels) regardless of insertions and deletions.

    โ€œa self-balancing binary search treeโ€

Source: https://en.wiktionary.org/wiki/self-balancing