protactinium

noun prot·ac·tin·i·um \ ˌprō-ˌtak-ˈti-nē-əm \

Definition of protactinium

: a shiny radioactive metallic element of relatively short life — see Chemical Elements Table

Origin and Etymology of protactinium

New Latin


Medical Dictionary

protactinium

noun prot·ac·tin·i·um \ ˌprōt-ˌak-ˈtin-ē-əm \
variants: also protoactinium play \ˌprōt-ō-\

medical Definition of protactinium

: a shiny metallic radioelement of relatively short life symbol Pa — see Chemical Elements Table

Learn More about protactinium


Seen and Heard

What made you want to look up protactinium? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

having a quality expressive of sadness

Get Word of the Day daily email!

Test Your Vocabulary

February 2018 Words of the Day Quiz

  • a-dog-in-snow-jumping-to-grab-a-heart-shaped-balloon-the-snow-and-heart-balloon-indicate-that-the-month-being-represented-is-april-and-the-dog-is-just-kinda-cute
  • Which is a synonym of sanguine?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!