A systematic element name is the temporary name assigned to an unknown or recently synthesized chemical element. Wikipedia

Temporary name assigned to newly synthesized or not yet synthesized chemical elements Wikidata

A systematic name for an element, derived from the digits of its atomic number to which the suffix -(i)um is appended; normally only used for transuranic elements before or for a short period after they have been created, after which they will be given a non-systematic name. Wiktionary