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

• turncock
• turndown
• turned
• turned on
• turned out
• turner
• Turner's syndrome
• turnery
• Turnicidae
• turning
• turning away
• turning circle
• turning point
• turnip
• turnip bed
• turnip cabbage
• turnip greens
• turnip plant
• turnip-rooted celery
• turnip-rooted parsley
• turnip-shaped
• Turnix
• Turnix sylvatica
• turnkey
• turnoff