bascule

/หˆbรฆskjuหl/

IPA: /B AE1 S K Y UW0 L/

noun
  1. 1

    A counterbalanced structure having one end that rises as the other lowers

  2. 2

    The portion of a breech-loading firearm that pivots open in order to allow access to the chamber.

Source: https://en.wiktionary.org/wiki/bascule