What does dysprosium mean?
Dysprosium is a chemical element, one of the fifteen lanthanides commonly grouped as rare earth metals. A soft, bright silvery metal with atomic number 66, it does not occur free in nature but is extracted from mineral ores such as monazite and bastnäsite. Its defining property is its behaviour in magnetic fields: small additions of dysprosium dramatically improve the ability of neodymium-iron-boron magnets to retain their magnetism at high temperatures. That makes it essential to modern technology — electric vehicle motors, wind turbine generators, headphones, and data-storage devices all depend on it. It also finds use in nuclear reactors, where its neutron-absorbing capacity suits it for control rods, and in certain lasers and halide lamps. Because most global production is concentrated in a few sources, dysprosium is frequently cited in debates over critical-mineral security. The name comes from the Greek 'dysprositos', meaning hard to get at, reflecting how difficult it proved to isolate.
nounA soft, silvery metallic element of the lanthanide series, atomic number 66, used chiefly in magnets, lasers, and nuclear reactor control rods.
- The chemical element dysprosium, a silvery lanthanide metal with atomic number 66, valued for its magnetic properties.
"The wind turbine's permanent magnets rely on a steady supply of dysprosium to withstand high operating temperatures."
"Dysprosium is added to neodymium magnets so they keep their strength in the heat of electric vehicle motors."
"Because dysprosium absorbs neutrons efficiently, it has been used in control rods for nuclear reactors."
Rarely used. As an uncountable mass noun naming the element itself, dysprosium normally has no plural; a plural form occurs only informally when counting distinct samples, isotopes, or allotropes.
"The lab compared several purified dysprosiums from different ore sources."
Its name literally means 'hard to get at' in Greek — because isolating it took chemists decades of frustrating effort.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of dysprosium
The word dysprosium derives from the Greek 'dysprositos', meaning 'hard to get at' or 'difficult of access', formed from the prefix 'dys-' (bad, difficult) plus 'prositos' (approached, accessible). The French chemist Paul-Émile Lecoq de Boisbaudran identified the element spectroscopically in 1886 and chose the name to reflect the great difficulty he had in separating it from other rare earths. The same Greek prefix appears in many scientific terms such as dyslexia and dysfunction.
How dysprosium is actually used
Strictly a technical term, encountered mainly in chemistry, physics, materials science, and discussions of critical minerals and supply chains. It has no figurative or informal uses.
Easily confused with dysprosium
Caesium is an alkali metal of low density that is liquid near room temperature, whereas dysprosium is a dense lanthanide metal used in high-strength magnets.