| 单词 | prometheums |
| 释义 | Promethean /prō-mēˈthi-ən or -thyən/adjective
A glass tube containing sulphuric acid and an inflammable mixture brought together by pressing, an early kind of match promēˈthium (formerly promēˈtheum) noun A radioactive lanthanide element (symbol Pm; atomic no 61) |
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