ephemeral
e-phem-er-al
noun
An organism with a very short life span.
"Mayflies are ephemeral insects."
adjective
Lasting for a very short time.
"The beauty of cherry blossoms is ephemeral."
adjective
Short-lived or transitory.
"Morning dew is an ephemeral phenomenon."
Thesaurus
Synonyms: ephemeron, fugacious, passing, short-lived, transient, impermanent, temporary, transitory