noun 다운로드 🔗공유 옥탄 Any of the eighteen isomeric aliphatic hydrocarbons (C8H18) found in petroleum, especially an iso-octane 2,2,4 trimethyl-pentane; they are used as fuels and solvents. Examples : "The car engine requires high octane fuel to prevent knocking and improve performance. " 자동차 엔진은 노킹을 방지하고 성능을 향상시키기 위해 고옥탄 연료를 필요로 합니다. compound substance chemistry fuel AI와 채팅어휘 게임독해 연습