1. A radioactive transuranic element
   - meitnerium, Mt, element 109

Type of: chemical element, element

• Arabidopsis thaliana
• arability
• arabinose
• Arabis
• Arabis Canadensis
• Arabis glabra
• Arabis turrita
• Arabist
• arable
• Araceae
• araceous
• Arachis
• Arachis hypogaea
• arachnid
• Arachnida
• arachnidian
• arachniography
• arachnoid
• arachnoid membrane
• arachnology
• arachnophobia
• Arafat
• Arafura Sea
• Aragon
• aragonite