nounpl. -·era or -·er·ons·
Origin of ephemeronClassical Greek eph?meron, short-lived insect from eph?meros, for the day, short-lived from epi-, upon + h?mera, day
nounpl. e·phem·er·a, or e·phem·er·ons
- A short-lived thing.
- ephemera Printed matter of passing interest.
Origin of ephemeronGreek ephēmeron mayfly from neuter of ephēmeros daily, short-lived ; see ephemeral .
- something short lived or transitory
From Ancient Greek eph- + ἡμέρα (hēmerā, “day”).