[Or.do.vi.cian] adj [L Ordovices, ancient people in northern Wales] (1879): of, relating to, or being the period between the Cambrian and the Silurian or the corresponding system of rocks--see geologic time table -- Ordovician n
ORDOVICIAN
Meaning of ORDOVICIAN in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012