The Wordsmith Dictionary

Exact matches only Allow stemming Match all embedded

English-Thai Dictionary

didymium

N ส่วนผสม ของ neodynium และ praseodymium

Webster's 1913 Dictionary

DIDYMIUM

Di *dym "i *um, n. Etym: [NL. , fr. Gr. (Chem. )

Defn: A rare metallic substance usually associated with the metal cerium; -- hence its name. It was formerly supposed to be an element, but has since been found to consist of two simpler elementary substances, neodymium and praseodymium. See Neodymium, and Praseodymium.

New American Oxford Dictionary

didymium

di dym i um |dīˈdimēəm daɪˈdɪmiəm | ▶noun Chemistry a mixture containing the rare earth elements praseodymium and neodymium, used to color glass for optical filters. It was originally regarded as a single element. ORIGIN mid 19th cent.: from Greek didumos ‘twin ’ (because it was closely associated with lanthanum ) + -ium (used as a suffix for new metals ).

Oxford Dictionary

didymium

didymium |dɪˈdɪmɪəm | ▶noun [ mass noun ] Chemistry a mixture containing the rare earth elements praseodymium and neodymium, used to colour glass for optical filters. It was originally regarded as a single element. ORIGIN mid 19th cent.: from Greek didumos ‘twin ’ (because it was closely associated with lanthanum ) + -ium (used as a suffix for new metals ).