Ephemeral

The Burn 2010 © JaneFultonAlt

e·phem·er·al   
[ih-fem-er-uhl]
–adjective
1.
lasting a very short time; short-lived; transitory: the ephemeral joys of childhood.
2.
lasting but one day: an ephemeral flower.
–noun
3.
anything short-lived

—Synonyms
1. fleeting, evanescent, transient, momentary, brief.