a shield used for protection against radiation, esp. one covering a nuclear reactor or cyclotron.
| 单词 | θ89154 |
| 释义 | the world > action or operation > safety > protection or defence > [noun] > means of protection or defence > device or contrivance to protect a thing or person > device or substance protecting from radiation (2) biological shield1949 a shield used for protection against radiation, esp. one covering a nuclear reactor or cyclotron. radioprotector1955 A radioprotective substance. |
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