actinide

American  

[ak-tuh-nahyd] / ˈæk təˌnaɪd /

noun

Chemistry.

1. any element of the actinide series.

---

actinide British  

/ ˈæktɪˌnaɪd /

noun

1. Also called: actinon.  a member of the actinide series

---

actinide Scientific  

/ ăk′tə-nīd′ /

1. 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.

2. See Periodic Table

---

Etymology

Origin of actinide

1940–45; actin- + -ide, on the model of lanthanide

Example Sentences

Many of these elements, such as those in the lanthanide and actinide series, have applications ranging from cancer diagnostics and treatment to renewable energy technologies and long-lived nuclear batteries for deep space exploration.

From Science Daily

Researchers continue sketching out the full picture of actinide isotopes.

From Science Daily

Similar parallel formation mechanisms exist for the other actinide elements but Pu-239 is the main product of these reactions.

From Forbes

However, there were no reports of an actinide metal complex that could reductively couple with carbon dioxide to give a segment made from two carbon dioxide molecules – an oxalate dianion.

From Scientific American

In the years that followed, he served on Nuclear Regulatory Commission discussion panels, a National Academy of Sciences panel on nuclear waste and created a research center for the study of actinide materials.

From Scientific American