ag·er·a·tum ( j  -r  tm)n. 1. Any of various New World plants of the genus Ageratum in the composite family, especially A. houstonianum, having showy, colorful flower heads. 2. Any of several other plants having flower clusters similar to the ageratum. [New Latin Ag  ratum, genus name, from Greek agraton, a plant (perhaps a type of rosemary), neuter of agratos, ageless : a-, without; see a-1 + gras, old age; see ger-1 in Indo-European roots.] |
ageratum [ˌædʒəˈreɪtəm]
n
(Life Sciences & Allied Applications / Plants) any tropical American plant of the genus Ageratum, such as A. houstonianum and A. conyzoides, which have thick clusters of purplish-blue flowers
[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]
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  ageratum - rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus Eupatoriumflower - a plant cultivated for its blooms or blossoms Conoclinium, genus Conoclinium - mistflower |
| 2. |  ageratum - any plant of the genus Ageratum having opposite leaves and small heads of blue or white flowersflower - a plant cultivated for its blooms or blossoms genus Ageratum - genus of tropical American herbs grown for their flowers Ageratum houstonianum, common ageratum - small tender herb grown for its fluffy brushlike blue to lavender blooms |
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