vicesimus

Etymology
From the stem of  before the replacement of  with, ultimately from. Particularly:
 * Remodeling of earlier, from , with the added suffix of.
 * Or, inherited from, a direct continuation of , containing the superlative suffix (compare ) as used also in 🇨🇬,.

See also and. Surface analysis

Numeral

 * 1)  twentieth
 * 2) one-twentieth
 * vīcēsimā hērēditātium
 * a 5% inheritance tax undefined

Related terms

 * (borrowed from to mean the 20th day of a month)