1. A grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
   - hafnium, Hf

Type of: metal, metallic element

• reducer
• reducible
• reducing
• reducing agent
• reducing diet
• reductant
• reductase
• reductio
• reductio ad absurdum
• reduction
• reduction division
• reduction gear
• reductionism
• reductionist
• reductive
• reductivism
• redundance
• redundancy
• redundancy check
• redundant
• redundantly
• reduplicate
• reduplication
• reduplicative
• reduviid