IPA: /vɪˈsɛnəri/
KK: /vɪˈsɛnəri/
Relating to the number twenty or a system that is based on twenty.
The vicenary system is used in some cultures for counting and measuring.
Vicenary → It is formed from "viceni" (from Latin, meaning twenty each) and the suffix "-ary" (meaning relating to or connected with). The word "vicenary" refers to something that is related to or consisting of twenty.
Think of 'twenty each' ('viceni') to remember that 'vicenary' relates to the number twenty.