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

Encyclopedia: Lustral

• commutative
• commutative group
• commutator
• commute
• commuter
• commuter traffic
• commuter train
• commuting
• comorbid
• comorbidity
• Comoro Islands
• Comoros
• comose
• comoving
• comp
• compact
• compact car
• compact disc
• compact disc read-only memory
• compact disc recordable
• compact disc write-once
• compact disk
• compact-disk burner
• compacter
• compactify