didymium

di·dym·i·um  (d-dm-m)

n.

1. Symbol Di A metallic mixture, once considered an element, composed of neodymium and praseodymium.

2. A mixture of rare-earth elements and oxides used chiefly in manufacturing and coloring various forms of glass.

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[From Greek didumos, twin, double; see dwo- in Indo-European roots.]

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didymium [daɪˈdɪmɪəm dɪ-]

n

1. (Chemistry / Elements & Compounds) a mixture of the metallic rare earths neodymium and praseodymium, once thought to be an element

2. (Chemistry / Elements & Compounds) (Fine Arts & Visual Arts / Colours) a mixture of rare earths and their oxides used in colouring glass

[from New Latin, from Greek didumos twin + -ium]