[mass noun]a hard glassy mineral occurring as octahedral crystals of variable colour and consisting chiefly of magnesium and aluminium oxides 尖晶石 ■[count noun](Chemistry) any of a class of oxides including this, containing aluminium and another metal and having the general formula MA12O4 (化)含尖晶石氧化物
语源
early 16th cent.: from French spinelle, from Italian spinella, diminutive of spina 'thorn'