9 letters · 16 points in Scrabble
noun an annual publication containing astronomical tables that give the positions of the celestial bodies throughout the year
originFrom New Latin ephēmeris, from Ancient Greek ἐφημερίς (ephēmerís, “diary, calendar”), from ἐφήμερος (ephḗmeros, “daily”).
Etymology from Wiktionary, CC BY-SA 3.0