剑桥词典from or referring to the period of time between about 420 and 360 million years ago, in which many plants , including the first trees , appeared on land 泥盆纪（或系）的 the Devonian period 泥盆纪 Devonian rocks 泥盆纪岩石 the Devonian noun [ 单数名词 ] the Devonian period 泥盆纪 返回 Devonian