/ɛfəˈmɛrɪst/ (ef-uh-MEER-ist)

Definitions

1. noun

A person who studies or writes about ephemera, especially in the fields of history, literature, or art.

“She was an expert ephemerist with a keen eye for rare and unusual historical artifacts.”

2. noun

One who predicts the occurrence and disappearance of celestial bodies, such as comets.

“The young astronomer became an ephemerist, publishing charts that helped others track the movements of the stars.”