transactinide[trans ak′tə nīd′, tranz-]
any of the radioactive chemical elements that have atomic numbers higher than the highest actinide (lawrencium)
also called transactinide element
Of or belonging to the series of elements whose atomic numbers are greater than 103.
(comparative more transactinide, superlative most transactinide)
- (chemistry, physics) Any of the artificially produced elements having an atomic number greater than 103.