Wiktionary
interregna
n. (en-irregular plural of: interregnum)
WordNet
interregna
See interregnum
interregnum
n. the time between two reigns, governments, etc.
[also: interregna (pl)]
Usage examples of "interregna".
But these brief interregna were nothing compared to the billions of years of nonbeing between now and the end of the Universe, and the machineries which stored her self and gave her rebirth time and time again were real in a way that the Preservers were not.
Attention was once more turned to affairs of State, and after one or two interregna had expired, P.