| Dy The symbol for the element dysprosium. |
dys·pro·si·um  (dĭs-prō'zē-əm, -zhē-əm)  n. Symbol Dy A soft, silvery rare-earth element used in nuclear research. Atomic number 66; atomic weight 162.50; melting point 1,407°C; boiling point 2,600°C; specific gravity 8.536; valence 3. See Table at element. [New Latin, from Greek dusprositos, difficult to approach : dus-, dys- + prositos, approachable (from prosienai, to approach : pros-, toward + ienai, i-, to go; see ei- in Indo-European roots).] |
Dy
The symbol for the element dysprosium.
| Dy
The symbol for dysprosium. |
| dysprosium (dĭs-prō'zē-əm) Pronunciation Key
Symbol Dy A soft, silvery metallic element of the lanthanide series. Because it has a high melting point and absorbs neutrons well, dysprosium is used to help control nuclear reactions. Atomic number 66; atomic weight 162.50; melting point 1,407°C; boiling point 2,600°C; specific gravity 8.536; valence 3. See Periodic Table. |
| Dy dysprosium |
| DY Benin (international vehicle ID) |
Dy
(Dy), chemical element, rare-earth metal of the lanthanoid series of the periodic table. A relatively hard and very reactive metal, it is oxidized by air and by water. Its high melting point and ability to absorb neutrons make it useful in control rods for nuclear reactors. Its compounds have been used for making laser materials, as components in some electronic equipment, and as phosphor activators
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