actinide
Any of the 15 radioactive elements of the periodic table from actinium to lawrencium…Any of the 15 radioactive elements of the periodic table from actinium to lawrencium that are positioned under the lanthanides, to which they have similar chemistry.
Meaning
3 sensesAny of the 15 radioactive elements of the periodic table from actinium to lawrencium that are positioned under the lanthanides, to which they have similar chemistry.
Actiniden
Any of the 14 elements from actinium to nobelium (lawrencium is excluded by some authors as it is a d-block rather than an f-block element).
(dated)Any of the 14 elements from thorium to lawrencium (actinium having been mistakenly excluded because it was thought to be a d-block element in the past).
- any of a series of radioactive elements with atomic numbers 89 through 103
Translations
4 languagesBy meaning 1
Origin
From actin- + -ide.From actin- + -ide.
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