multimillennial
Multimillennial is an adjective used to describe phenomena, periods, or perspectives that extend over more than one thousand years, i.e., across multiple millennia. The term combines the prefix multi- meaning many with millennial, relating to a thousand years or to a long temporal span, to indicate a duration that surpasses a single millennium.
Etymology and sense: The construction reflects a measurement of time well beyond a millennium. It is a
Contexts and usage: Multimillennial perspectives appear in disciplines that examine long-term processes, such as geology, paleoclimatology,
Limitations: Because multimillennial is informal and imprecise, its exact interpretation can vary by author or field.
See also: deep time, long-term change, geologic time scale, paleoclimatology.