actinide

[ak-tuh-nahyd] /ˈæk təˌnaɪd/
noun, Chemistry
1.
any element of the actinide series.
Origin
1940-45; actin- + -ide, on the model of lanthanide
Examples from the web for actinide
  • And if you pack together enough of certain actinide atoms, their nuclei will erupt in a powerful release of energy.
  • The actinide series derives its name from the first element in the series, actinium.
  • New methods were implemented to improve the actinide method for urine.
  • The first step of this modeling is a proper description of the actinide complex.
British Dictionary definitions for actinide

actinide

/ˈæktɪˌnaɪd/
noun
1.
a member of the actinide series Also called actinon
Word Origin
C19: from actino- + -ide
actinide in Medicine

actinide ac·ti·nide (āk'tə-nī'd)
n.
Any of a series of chemically similar radioactive elements with atomic numbers ranging from 89 (actinium) through 103 (lawrencium).

actinide in Science
actinide
  (āk'tə-nīd')   
Any of a series of chemically similar metallic elements with atomic numbers ranging from 89 (actinium) to 103 (lawrencium). All of these elements are radioactive, and two of the elements, uranium and plutonium, are used to generate nuclear energy. See Periodic Table.