安あん定てい板ばん

noun

stabilizing fin

Technical term for a fin or plate used to improve stability, especially in aerodynamics, marine engineering, or similar fields.

• ロケットの安あん定てい板ばんが飛ひ行こう中ちゅうの姿し勢せいを保たもつ。

  The rocket's stabilizing fins keep it stable during flight.