vicennial

• صفة تصف شيئًا يحدث كل عشرين سنة أو يستمر مدة عشرين سنة. قليلة الاستعمال في العربية المعاصرة.

An adjective describing something that occurs every twenty years, or lasts for a period of twenty years. It is rarely used in modern English.

1. Occurring every twenty yearsC2formal

   Happening or recurring once every twenty years.

   كل عشرين سنة

   • The society holds a vicennial celebration for its founding members.
   • The vicennial census provides long-term demographic data.
   • They planned a vicennial reunion for the graduating class.