| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024ag•er•a•tum (aj′ə rā′təm, ə jer′ə-),USA pronunciation n. - Plant Biologyany of several composite plants of the genus Ageratum, esp. A. houstonianum, having heart-shaped leaves and small, dense, blue, lavender, or white flower heads, often grown in gardens.
- Plant Biologyany of various other composite plants, as the mistflower, having blue or white flowers.
- Greek agé̄raton, neuter of agé̄ratos unaging, equivalent. to a- a-6 + gērat- (stem of gêras) old age + -os adjective, adjectival suffix
- Neo-Latin; Latin agēraton
- 1560–70
Collins Concise English Dictionary © HarperCollins Publishers:: ageratum /ˌædʒəˈreɪtəm/ n - any tropical American plant of the genus Ageratum, such as A. houstonianum and A. conyzoides, which have thick clusters of purplish-blue flowers
Etymology: 16th Century: 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 |