1. Plural of hafnium; multiple atoms or samples of the chemical element hafnium (Hf), a hard silvery metal with atomic number 72.
Usage: chemistry; technical

Examples

• Hafniums are used in nuclear reactor control rods because of their high neutron absorption capacity.
• The laboratory stored several hafniums samples in sealed containers.
• Different isotopes of hafniums have varying levels of stability.
• Hafniums compounds are employed in high-temperature applications and aerospace engineering.
• The periodic table lists hafniums among the transition metals.