trimorphism /trī-mörˈfi-zm/

1. Occurrence of three forms in the same species (biology)
2. The property of crystallizing in three forms (chem)

• hydrogen ions
• hydrogenise
• hydrogenised
• hydrogenises
• hydrogenising
• hydrogenize
• hydrogenized
• hydrogenizes
• hydrogenizing
• hydrogenous
• hydrogen peroxide
• hydrogens
• hydrogen sulphide
• hydrogeologies
• hydrogeologist
• hydrogeologists
• hydrogeology
• luffing
• luffing crane
• luffing cranes
• luffing-jib crane
• luffs
• Luftwaffe
• lug
• lug-chair