superheavy element

== English == === Noun === superheavy element (plural superheavy elements) A chemical element with an extremely high atomic number; typically taken to mean beyond lawrencium (element 103, the last actinide) ==== Usage notes ==== There is some dispute as to how high an element's atomic number has to be before it counts as 'superheavy'; the usual criterion is anything beyond lawrencium: in other words, any transactinide.