† vigesimationn.
Etymology: < Latin vīg-, vīcēsimātio: compare vigesimal adj. and decimation n.
Obsolete.
rare. Apparently only attested in dictionaries or glossaries.
1727 N. Bailey II Vigesimation, a putting to Death every twentieth Man.
This entry has not yet been fully updated (first published 1917; most recently modified version published online June 2021).