[aj-uh-rey-tuh m, uh-jer-uh-]
- 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.
- any of various other composite plants, as the mistflower, having blue or white flowers.
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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ageratum
The soft blue tufts of the ageratum were on each side continually.Bonaventure
George Washington Cable
Ageratum, candytuft and dwarf nasturtiums are good for the purpose.The Library of Work and Play: Gardening and Farming.
Ellen Eddy Shaw
It is easily grown, and makes a fine second-row plant for a border, contrasting well with Browallia or Ageratum.The Practical Garden-Book
C. E. Hunn
"We've decided on ageratum for the border and larkspur and monkshood for the back," said Ethel Brown.
I should think a low-growing plant like ageratum would be pretty in a vase of that sort.
- any tropical American plant of the genus Ageratum, such as A. houstonianum and A. conyzoides, which have thick clusters of purplish-blue flowers
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
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