1. Of or relating to or marking the 50th anniversary
   - semicentenary

1. The 50th anniversary (or the celebration of it)
   - semicentenary

Derived forms: semicentennials

Type of: anniversary, day of remembrance

Encyclopedia: Semicentennial

• antitrade
• antitrade wind
• antitrades
• antitrust
• antitrust case
• antitrust law
• antitrust legislation
• antitumor
• antitumour
• antitussive
• antitype
• antitypic
• antitypical
• antivenene
• antivenin
• Antivert
• antiviral
• antiviral agent
• antiviral drug
• antivirus
• antivivisectionist
• antler
• antler moth
• antler-like
• antlered