1. A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
   - protactinium, protoactinium, Pa

Type of: metal, metallic element

• Andrews
• Andricus
• Andrija Mohorovicic
• andro-
• androecium
• androgen
• androgenesis
• androgenetic
• androgenic
• androgenic hormone
• androgenous
• androgeny
• androglossia
• androgyne
• androgynous
• androgyny
• android
• andromeda
• Andromeda galaxy
• Andromeda glaucophylla
• Andromeda polifolia
• androphobia
• Andropogon
• Andropogon furcatus
• Andropogon gerardii