| 单词 | yttrium |
| 释义 | Word Frequency yttrium(ˈɪtrɪəm) noun 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 Derived forms yttric (ˈyttric) adjective Word origin C19: New Latin; see ytterbia |
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