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


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.

Words nearby ageratum

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ageratum

British Dictionary definitions for ageratum

/ (ˌædʒəˈreɪtəm) /


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

Word Origin for ageratum

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