Usage examples (7)

• Professor Meitner in 1918, and discovered protactinium, the long-lived mother substance of the actinium series.
• Kudos to moose drool whose handle happens to rhyme with April Fools, too! for the initial protactinium outline.
• Her expertise was on separating protactinium from carnotite and she had previously worked as a consultant for physicians and hospitals. 141
• An element discovered in 1982 has been named meitnerium to honor Lise Meitner (1878-1968), the Austrian-Swedish physicist and mathematician who discovered the element...