ephemera

/ɪˈfɛmərə/
noun
  1. Things that are important or useful for only a short time; items that are not meant to last, such as tickets, pamphlets, or posters.
    • Most advertising ephemera is thrown away within days of being handed out.
    • The museum has a large collection of printed ephemera from the 19th century.
    • Old concert tickets and flyers are considered ephemera by collectors.
  2. A type of insect (mayfly) that lives as an adult for only a very short time, often just a day.
    • The life cycle of ephemera is fascinating because the adults barely eat.
    • Ephemera are often seen swarming near rivers in late spring.
    • Fishermen use artificial flies that imitate ephemera to catch trout.
Synonyms
What does "ephemera" mean? | whatsthatwordmean | whatsthatwordmean