An example of ephemeral is a plant blossom that only lasts one day.
Origin of ephemeral
- From Greek ephēmeros ep-, epi- epi- hēmerā day
From American Heritage Dictionary of the English Language, 5th Edition
- From New Latin ephemerus, from Ancient Greek ἐφήμερος (ephēmeros), the more common form of ἐφημέριος (ephemerios, “of, for, or during the day, living or lasting but for a day, short-lived, temporary”), from ἐπί (epi, “on”) + ἡμέρα (hēmera, “day”).