| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024ne•o•dym•i•um (nē′ō dim′ē əm),USA pronunciation n. [Chem.]- Chemistrya rare-earth, metallic, trivalent element occurring with cerium and other rare-earth metals, and having rose-colored to violet-colored salts. Symbol: Nd;
at. wt.: 144.24;
at. no.: 60;
sp. gr.: 6.9 at 20°C.
- Neo-Latin; see neo-, didymium
- 1880–85
Collins Concise English Dictionary © HarperCollins Publishers:: neodymium /ˌniːəʊˈdɪmɪəm/ n - a toxic silvery-white metallic element of the lanthanide series, occurring principally in monazite: used in colouring glass. Symbol: Nd; atomic no: 60; atomic wt: 144.24; valency: 3; relative density: 6.80 and 7.00 (depending on allotrope); melting pt: 1024°C; boiling pt: 3127°C
Etymology: 19th Century: New Latin; see neo- + didymium |