1. Ancient Persian religion; popular among Romans during first three centuries a.d.
   - Mithraism

Type of: faith, religion, religious belief

• blacken
• blacken out
• blackened
• blackening
• blackface
• blackfish
• blackfly
• Blackfoot
• blackfoot daisy
• Blackfriar
• blackguard
• blackguardly
• blackhead
• blackheart
• blackheart cherry
• blacking
• blackish
• blackish-brown
• blackish-gray
• blackish-grey
• blackish-red
• blackjack
• blackjack oak
• blacklead
• blackleg