Emily Dickinson Lexicon

E-PHEM'ER-IS, n. [plur. ephemer'ides. Gr. εφημερις.]

1. A journal or account of daily transactions; a diary.
2. In astronomy, an account of the daily state or positions of the planets or heavenly orbs; a table or collection of tables, exhibiting the places of the planets every day at noon. From these tables are calculated eclipses, conjunctions and other aspects of the planets. Encyc.