/ˌsu pərˈhɛv i/
pertaining to any of a series of elements having an atomic number greater than 103.
heavier than usual for its kind:
a superheavy oil; superheavy magnetic monopoles.
denoting or relating to elements of high atomic number (above 109) postulated to exist with special stability as a consequence of the shell model of the nucleus
Collins English Dictionary - Complete & Unabridged 10th Edition
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This synthetic element is one of the socalled superheavy atoms.