ageratum

American  

[aj-uh-rey-tuhm, uh-jer-uh-] / ˌædʒ əˈreɪ təm, əˈdʒɛr ə- /

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.

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ageratum British  

/ ˌædʒəˈreɪtəm /

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

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Etymology

Origin of ageratum

1560–70; < New Latin; Latin agēraton < Greek agḗraton, neuter of agḗratos unaging, equivalent to a- a- ⁶ + gērat- (stem of gêras ) old age + -os adj. suffix

Example Sentences

See Examples For:

ageratum

Taking a different approach, Entomologist William Bowers, of the New York State Agricultural Experiment Station, has isolated two substances from ageratum, a flowering plant, that interfere with an insect's production of juvenile hormones.

From Time Magazine Archive

Along the walks ageratum was planted in the following manner to serve as a border.

From The Library of Work and Play: Gardening and Farming. by Shaw, Ellen Eddy

This was money enough to buy seeds of ageratum, zinnia, dwarf nasturtium, California poppy and verbena besides some others.

From The Library of Work and Play: Gardening and Farming. by Shaw, Ellen Eddy

Annuals.—African daisy, ageratum, aster, calendula, calliopsis, balsam, candytuft, cornflower, cosmos, marigold, mignonette, nasturtium, petunia, poppy, stock, sweet alyssum, sweet-pea, verbena, zinnia, annual phlox, red sunflower, cut-and-come-again sunflower.

From Ontario Teachers' Manuals: Household Science in Rural Schools by Ontario. Ministry of Education

"I should think a low-growing plant like ageratum would be pretty in a vase of that sort."

From Ethel Morton's Enterprise by Smith, Mabell S. C. (Mabell Shippie Clarke)