1. A radioactive element of the alkali-metal group discovered as a disintegration product of actinium
   - francium, Fr

Type of: metal, metallic element

• echolocation
• echovirus
• echt
• Eck
• Eckhart
• eclair
• eclampsia
• eclectic
• eclectic method
• eclectically
• eclecticism
• eclecticist
• eclipse
• eclipsis
• ecliptic
• eclogue
• ECM
• eco-
• eco-friendly
• eco-warfare
• eco-warrior
• ecobabble
• ecocide
• ecologic
• ecological