triduum /tridˈū-əm or trīˈdū-/ (esp RC)

1. A space of three days
2. A period of prayer or religious celebration lasting three days

tridˈūan adjective

Lasting three days

• Catharism
• Catharist
• catharize
• catharized
• catharizes
• catharizing
• Cathars
• catharses
• catharsis
• cathartic
• cathartical
• cathartically
• cathartics
• Cathayan
• cathead
• catheads
• cathectic
• cathedra
• cathedral
• cathedrals
• cathedras
• cathedratic
• Catherine pear
• Catherine-wheel
• catheter