Discovery :: Discovery (n.) Finding out or ascertaining something previously unknown or unrecognized; as, Harvey's discovery of the circulation of the blood..
Discovery :: Discovery (n.) That which is discovered; a thing found out, or for the first time ascertained or recognized; as, the properties of the magnet were an important discovery..
Metadiscoidal :: Metadiscoidal (a.) Discoidal by derivation; -- applied especially to the placenta of man and apes, because it is supposed to have been derived from a diffused placenta..