Things that exist or are used for only a short time; items of temporary interest or value. Often refers to collectible items like tickets, postcards, or pamphlets.
From Greek 'ephemeros' meaning 'lasting only a day', combining 'epi' (upon) and 'hemera' (day). Originally used for insects like mayflies that live briefly, it expanded to describe any transient objects.
Remember that mayflies are ephemeral - they literally live for just one day! The 'hemera' root connects to 'hemisphere' (half the day/night cycle).
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