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glacial▼(glacial period)noun[UK: ˈɡleɪ.sɪəl] [US: ˈɡleɪ.ʃəl]
ice age▼(any of several glacial periods)noun[UK: aɪs eɪdʒ] [US: ˈaɪs ˈeɪdʒ]
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