Transient

Transience , sometimes only used as an adjective transient (English "temporarily", all in Latin transire "passing"), describes something temporary or fleeting.

It is:

in engineering generally for the statistical term unsteady
in computer science for "volatile" data loaded into the memory for a limited time, see buffer (computer science)
in electrical engineering and acoustics for a very fast, impulsive settling process, the transients
in genetic engineering for a gene that is taken up by a cell as a plasmid but not incorporated into the genome, see plasmid
in mathematics for a term from the theory of Markov chains, see Transient Markov chain

Wiktionary: transient - explanations of meanings, word origins, synonyms, translations

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