| 单词 | Polaris |
| 释义 | Word Frequency Polaris(pəˈlɑːrɪs) noun 1. Also called: the Pole Star, the North Star the brightest star in the constellation Ursa Minor, situated slightly less than 1° from the north celestial pole. It is a Cepheid variable, with a period of four days. Visual magnitude: 2.08–2.17; spectral type:F8Ib 2. a. a type of US two-stage intermediate-range ballistic missile, usually fired by a submerged submarine b. (as modifier) a Polaris submarine Word origin shortened from Medieval Latin stella polāris polar star |
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