An Etymological Dictionary of Astronomy and Astrophysics

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actinide

اکتینید

aktinid (#)

Fr.: actinide

Any member of the group of → chemical elements with → atomic numbers from 89 (→ actinium) to 103 (→ lawrencium), analogous to the → lanthanides.

From the chemical element → actinium.

An Etymological Dictionary of Astronomy and Astrophysics
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