階 名詞1.(臺階) steps; stairs 石階 stone stairs; 臺階 a flight of steps2.(等級) rank 軍階 military rank3.[醫(yī)學(xué)] (耳蝸的三個螺旋管的任一個) scala 中階 scala media4.[數(shù)學(xué)] order 非整數(shù)階 non-integral order; 矩陣的階 order of a matrix5.[地質(zhì)學(xué)] stage 瓦倫特階 valentian stage; 韋爾芬階 werfenian stage