单词 | ageratum |
释义 | Word Frequency ageratum(ˌædʒəˈreɪtəm) noun any tropical American plant of the genus Ageratum, such as A. houstonianum and A. conyzoides, which have thick clusters of purplish-blue flowers Word origin C16: New Latin, via Latin from Greek agēraton that which does not age, from a-1 + gērat-, stem of gēras old age; the flowers of the plant remain vivid for a long time |
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