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单词 yttrium
释义

WordReference Random House Learner's Dictionary of American English © 2024
yt•tri•um /ˈɪtriəm/USA pronunciation   n. [uncountable]
  1. Chemistrya rare metallic element.

WordReference Random House Unabridged Dictionary of American English © 2024
yt•tri•um  (i′trē əm),USA pronunciation n. [Chem.]
  1. Chemistrya rare trivalent metallic element, found in gadolinite and other minerals. Symbol: Y;
    at. wt.: 88.905;
    at. no.: 39;
    sp. gr.: 4.47. Cf. rare-earth element. 
  • Neo-Latin, named after Ytterby. See ytterbia, -ium
  • 1815–25
yt′tric, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::
yttrium /ˈɪtrɪəm/ n
  1. a silvery metallic element occurring in monazite and gadolinite and used in various alloys, in lasers, and as a catalyst. Symbol: Y; atomic no: 39; atomic wt: 88.90585; valency: 3; relative density: 4.469; melting pt: 1522°C; boiling pt: 3338°C
Etymology: 19th Century: New Latin; see ytterbia
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