A table or publication showing the predicted or calculated positions of celestial objects (such as planets, stars, or the moon) at specific dates and times.
From Greek ephemeris, literally 'diary' or 'daily record,' from epi- 'upon' and hemera 'day'—originally meant something recorded day by day.
The Nautical Almanac, which provides daily ephemerides, has helped ships navigate for centuries—it's essentially a published prediction of the universe's movements.
Complete word intelligence in one call. Free tier — 50 lookups/day.