Logo
dictionary thesaurus

actinide

noun
ac·​ti·​nide | \ ˈak-tə-ˌnīd How to pronounce actinide (audio) \

Definition of actinide

: any of the series of elements with increasing atomic numbers that begins with actinium or thorium and ends with lawrencium — see Periodic Table

Examples of actinide in a Sentence

Recent Examples on the Web

 Uranium is currently the actinide of choice for the industry, used (sometimes with a little plutonium) in 100 percent of the world’s commercial reactors. — Richard Martin, WIRED, "Uranium Is So Last Century — Enter Thorium, the New Green Nuke," 21 Dec. 2009

First Known Use of actinide

1945, in the meaning defined above

History and Etymology for actinide

acti(nium) + (lantha)nide

Keep scrolling for more

WORD OF THE DAY

litmus test

play

See Definitions and Examples

Get Word of the Day daily email!