• Transactinide

    Origin

    - + actinide

    Full definition of transactinide

    Adjective

    transactinide

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

    Coordinate terms

    Noun

    transactinide

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