英语词汇“Planet X”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

　

单词	Planet X
释义	Definition of Planet X in English: Planet X noun ˌplanɪt ˈɛks Astronomy A hypothetical undiscovered planet in the solar system, whose supposed orbit lies beyond that of the outermost planet known; (originally) that identified as the ninth planet and named Pluto; (later) a hypothetical planet or planets beyond Pluto. Also (especially Science Fiction): (an arbitrary designation for) an unknown or hypothetical alien planet. Origin Late 19th century. From planet + X. Definition of Planet X in US English: Planet X nounˌplanɪt ˈɛks Astronomy A hypothetical undiscovered planet in the solar system, whose supposed orbit lies beyond that of the outermost planet known; (originally) that identified as the ninth planet and named Pluto; (later) a hypothetical planet or planets beyond Pluto. Also (especially Science Fiction): (an arbitrary designation for) an unknown or hypothetical alien planet. Origin Late 19th century. From planet + X.
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英语词典包含464360条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。

　

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更新时间：2025/1/11 17:36:39