multidecadal

adj — 2 senses

adj

Etymology From multi- + decadal.

Involving multiple decades

Lasting or spanning multiple decades

But distributed big science in this case consists of missions (also called projects) that make up an extended, multidecadal program of exploration2014, W. Henry Lambright, Why Mars: NASA and the Politics of Space Exploration, →ISBN:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.