n. official survey of the UK producing detailed maps. Ordovician iade’vt.fiany -adj. of the second period in the Palaeozoic era -n. this period. [Latin Ordovices, an ancient British tribe in N. Wales]
n. official survey of the UK producing detailed maps. Ordovician iade’vt.fiany -adj. of the second period in the Palaeozoic era -n. this period. [Latin Ordovices, an ancient British tribe in N. Wales]