1. A soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium
   - promethium, Pm

Type of: metal, metallic element

• millifarad
• milligram
• millihenry
• Millikan
• milliliter
• millilitre
• millime
• millimeter
• millimeter of mercury
• millimetre
• millimicron
• milline
• milliner
• millinery
• milling
• milling machine
• milling machinery
• million
• million floating point operations per second
• million instructions per second
• millionaire
• millionairess
• millionfold
• millionth
• scan