actinide

play
noun ac·ti·nide \ˈak-tə-ˌnīd\

Definition of actinide

  1. :  any of the series of elements with increasing atomic numbers that begins with actinium or thorium and ends with lawrencium — see periodic table table

Origin and Etymology of actinide

International Scientific Vocabulary


First Known Use: 1945


Learn More about actinide


Seen and Heard

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