actinide

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ac·ti·nide

 (ăk′tə-nīd′)
n.
Any of a series of chemically similar, radioactive elements with atomic numbers ranging from 89 (actinium) through 103 (lawrencium). Also called actinoid.

actinide

(ˈæktɪˌnaɪd)
n
(Elements & Compounds) a member of the actinide series. Also called: actinon
[C19: from actino- + -ide]

ac•ti•nide

(ˈæk təˌnaɪd)

n.
any element of the actinide series.
[1945; actin (ium) + -ide, on the model of lanthanide]

ac·ti·nide

(ăk′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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.actinide - any of a series of radioactive elements with atomic numbers 89 through 103actinide - any of a series of radioactive elements with atomic numbers 89 through 103
group, grouping - any number of entities (members) considered as a unit
Translations
Actinoid
actinide
aktinid