English

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Etymology

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trans- +‎ actinide

Adjective

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transactinide (not comparable)

  1. (chemistry, physics) Lying beyond lawrencium (the last actinide) in the periodic table; having an atomic number greater than 103.

Hypernyms

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Noun

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transactinide (plural transactinides)

  1. (chemistry, physics) Any of the artificially produced elements having an atomic number greater than 103.