51Թ

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ageratum

[aj-uh-rey-tuhm, uh-jer-uh-]

noun

  1. any of several composite plants of the genus Ageratum, especially A. houstonianum, having heart-shaped leaves and small, dense, blue, lavender, or white flower heads, often grown in gardens.

  2. any of various other composite plants, as the mistflower, having blue or white flowers.



ageratum

/ ˌæəˈɪə /

noun

  1. any tropical American plant of the genus Ageratum, such as A. houstonianum and A. conyzoides, which have thick clusters of purplish-blue flowers

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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51Թ History and Origins

Origin of ageratum1

1560–70; < New Latin; Latin ŧٴDz < Greek ḗrٴDz, neuter of ḗrٴDz unaging, equivalent to a- a- 6 + ŧ- (stem of ê ) old age + -os adj. suffix
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51Թ History and Origins

Origin of ageratum1

C16: New Latin, via Latin from Greek ŧٴDz that which does not age, from a- 1 + ŧ-, stem of ŧ old age; the flowers of the plant remain vivid for a long time
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Example Sentences

Examples have not been reviewed.

There were new flowers planted, too, among them gomphrena, ageratum, pansies and cosmos.

From

They learned that cosmos must be picked in bud, ageratum is less delicate than bachelor’s buttons, and the sappy, sticky calendulas stems should be booted from their bouquets.

From

There is the red, white and blue table with blue and white ageratum and red and white vinca.

From

But our gardens owe to this family innumerable beautiful and showy plants such as the China aster, the chrysanthemum, the cosmos, zinnia, dahlia, ageratum, gaillardia, coreopsis, sunflower, etc., etc.

From

Eupatorium—Thoroughwort Two forms are in the market—E. ageratoides, bearing numerous small white flowers in late summer, and E. cœlestinum, with light blue flowers similar to the ageratum.

From

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agerAgesilaus II