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The symbol for the element dysprosium.
The symbol for dysprosium.
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.
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[dahy-ad] /ˈdaɪ æd/ noun 1. a group of two; couple; pair. 2. Biology. 3. Chemistry. an element, atom, or group having a valence of two. Compare , (def 2a). 4. Mathematics. two vectors with no symbol connecting them, usually considered as an operator. 5. Sociology. adjective 6. of two parts; dyadic. /ˈdaɪæd/ noun 1. (maths) […]
[dahy-ad-ik] /daɪˈæd ɪk/ adjective 1. of or consisting of a dyad; being a group of two. 2. pertaining to the number 2. noun 3. Mathematics. two or more dyads added together. /daɪˈædɪk/ adjective 1. of or relating to a dyad 2. relating to or based on two; twofold 3. (logic, maths) (of a relation, predicate, […]
noun 1. . noun 1. a system involving only two elements, as 0 and 1 or yes and no. 2. Mathematics. a system of counting or measurement whose units are powers of two. Compare (def 2a). 3. Astronomy. .
- Dyadic systems limited