1. Of or pertaining to, or used for, purification; as, lustral days; lustral water 
2. Of or pertaining to a lustrum

Encyclopedia: Lustral

• Boleyn
• bolide
• Bolingbroke
• bolivar
• bolivia
• Bolivian
• Bolivian monetary unit
• boliviano
• boll
• boll weevil
• bollard
• bollix
• bollix up
• bollock
• bollocking
• bollocks
• bollocks up
• bollworm
• Bollywood
• bolo
• bolo knife
• bolo tie
• bologna
• Bologna sausage
• bolognese