auspex

• Is Teucer called auspex, as taking the auspices, like an augur, or as giving the auspices, like a god? —  The Odes and Carmen Saeculare of Horace
• There are objections to both interpretations; a Roman imperator was not called auspex, though he was attended by an auspex, and was said to have the auspicia; auspex is frequently used of one who, as we should say, inaugurates an undertaking, but only if he is a god or a deified mortal. —  The Odes and Carmen Saeculare of Horace
• No croaking raven turns the auspex pale, —  The Poetical Works of Oliver Wendell Holmes — Volume 10: Before the Curfew

Roget's II: The New Thesaurus