Noun
Mercurius (uncountable)
A homeopathic remedy involving mercury.
Coptic icon showing Saint Mercurius killing Julian. Source: Internet
Between 1716 and 1720 he published a monthly newspaper with old style title, Mercurius Politicus. Source: Internet
Basil prayed to Mercurius to help him, and the saint appeared in a vision to Basil, claiming to have speared Julian to death. Source: Internet
Mercurius was the first pope to adopt a new name upon elevation to the papacy. Source: Internet