Main entry: ephemeral, ephemeron
Definition: anything short-lived, as an insect that lives only for a day in its winged form
Main entry: transient, transitory, fugacious, ephemeral, short-lived, passing
Definition: lasting a very short time
Usage: the ephemeral joys of childhood; a passing fancy; youth's transient beauty; love is transitory but it is eternal; fugacious blossoms