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

• Jainist
• Jaish-e-Muhammad
• Jaish-i-Mohammed
• jak
• Jakarta
• jakes
• Jakob Behmen
• Jakob Bernoulli
• Jakob Boehm
• Jakob Boehme
• Jakob Bohme
• Jakob Grimm
• Jakob Hermandszoon
• Jakob Liebmann Beer
• Jakob Ludwig Felix Mendelssohn-Bartholdy
• Jakob Ludwig Karl Grimm
• Jakob-Creutzfeldt disease
• Jakobson
• Jalalabad
• jalap
• jalapeño
• jalapeño pepper
• jalopy
• jalousie
• jam