[ ɪ'fɛm(ə)rə , -'fi:m- ]
■ plural noun things that exist or are used or enjoyed for only a short time.
Derivatives
ephemerist noun
Origin
C16 (orig. (as singularnoun) denoting a plant said to last only one day, or an insect with a short lifespan): plural of ephemeron , from Gk, neut. of ephēmeros 'lasting only a day'.