transiently

Transiently is an adverb describing something that occurs or exists only for a short period and then disappears. In scientific and analytical writing, it often characterizes events, states, signals, or processes whose duration is brief relative to the system under study. Outside technical contexts, it can simply mean temporary or ephemeral, without implying any particular mechanism of disappearance.

Etymology: The word derives from transient, from Latin transire "to go across" and "at a time" via the English suffix -ly forming an adverb. The form transiently emerged in English in the early modern period and is common in formal writing; it is less frequent in everyday speech but widely understood.

Examples: The voltage spike was detected transiently during switch-off. The organism was transiently observed in the habitat after a disturbance. In molecular biology, the gene was transiently expressed under the inducible promoter. The population of the species appeared transiently in the region following the flood.

Related terms include ephemeral, temporary, and short-lived; the corresponding noun is transience and the adjective is transient. In technical contexts, precise duration is often specified to avoid ambiguity.