noun🔗Shareオクタン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."The car engine requires high octane fuel to prevent knocking and improve performance. "車のエンジンは、ノッキングを防ぎ、性能を向上させるために、ハイオクタン燃料を必要とします。compoundsubstancechemistryfuelChat with AIVocabulary GamePractice Reading
