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

• BVD
• BVD's
• BW
• BW defence
• BW defense
• bwana
• BWR
• by
• by a long shot
• by all means
• by all odds
• by and large
• by any means
• by artificial means
• by chance
• by choice
• by design
• by experimentation
• by far
• by fits and starts
• by George
• by gum
• by hand
• by heart
• by hook or by crook