| 单词 | calvus | 
| 释义 | calvus in American English (ˈkælvəs) adjective  Meteorology (of a cumulonimbus cloud)  having its upper portion changing from a rounded, cumuliform shape to a diffuse, whitish, cirriform mass with vertical striations Word origin[‹ NL, L: lit., bald] Examples of 'calvus' in a sentence | 
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