Noun
saeculum (plural saeculums or saecula)
A length of time roughly equal to the potential lifetime of a human being or, equivalently, the complete renewal of a human population.
"Der Fleischverzicht im Christentum," Saeculum 50/II (1999) p. 202. (The medieval definition of "fish" included such animals as seals, porpoises, dolphins, barnacle geese, puffins, and beavers.) Mortimer, Ian. Source: Internet
The continuing domination of the Counts of Tusculum was evident throughout Stephen’s pontificate, as it was during that of his predecessors and successors (see Saeculum obscurum ). Source: Internet
This period was later dubbed the Saeculum obscurum ("dark age"), and sometimes as the "rule by harlots". Source: Internet