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

• peregrination
• peregrine
• peregrine falcon
• Perejil
• peremptorily
• peremptory
• perennate
• perennation
• perennial
• perennial pea
• perennial ragweed
• perennial ryegrass
• perennial salt marsh aster
• perennially
• perennity
• Pereskia
• Pereskia aculeata
• perestroika
• perfect
• perfect game
• perfect gas
• perfect number
• hidden tax
• hiddenite
• hiddenness