EPHEMERIDES /ɛfɪˈmɛɹɪdiːz/ Scrabble 19 Words With Friends 20 Definition EPHEMERIDES is the plural of EPHEMERID. noun EPHEMERID: short-lived insect. See all 350 words you can make from EPHEMERIDES → 11-letter words Words starting with E Words ending with S ← Unscramble different letters