noun (plural -tum; also -tums) Etymology: New Latin, genus name, from Greek agēratos ageless, from a- + gēras old age — more at geront- Date: 1866 any of a genus (Ageratum) of annual tropical American composite herbs often cultivated for their small showy heads of usually blue or white flowers; also a related blue-flowered perennial (Eupatorium coelestinum)

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • Ageratum — Ageratum …   Wikipédia en Français

  • ageratum — [ aʒeratɔm ] n. m. • 1751; lat. d o. gr. ageraton ♦ Petite plante buissonnante ornementale (composées), à fleurs bleues. Une bordure d ageratums. ● ageratum ou agérate nom masculin (latin ageraton, du grec agêraton, impérissable) Herbe (composée) …   Encyclopédie Universelle

  • Ageratum — A*ger a*tum ([.a]*j[e^]r [.a]*t[u^]m or [a^]j [ e]r*[=a] t[u^]m), prop. n. [NL., fr. Gr. agh raton a sort of plant; a priv. + gh ras old age.] (Bot.) A genus of plants, one species of which ({Ageratum Mexicanum}) has lavender blue flowers in… …   The Collaborative International Dictionary of English

  • ageratum — [aj΄ər āt′əm] n. [ModL < Gr agēraton, a kind of plant < agēratos, not growing old < a , not + gēras, old age] any of several plants (genus Ageratum) of the composite family with small, thick heads of usually bluish flowers: widely used… …   English World dictionary

  • Ageratum — (A. L.), Pflanzengattung aus der Familie der Syngenesisten, Compositae Eupatoriaceae Agerateae, Syngenesia aequalis L.; Art: A. conyzoides, mit blauen, büschelständigen Blättern, aus Amerika …   Pierer's Universal-Lexikon

  • Agerātum — L., Gattung der Kompositen, Kräuter oder Sträucher mit ebensträußigen lockern oder dichten Blütenrispen, in Brasilien, Mittel und Nordamerika. A. conyzoides L., in den wärmern Gegenden der ganzen Welt, einjährig, mit blauen Blüten, wird wie die… …   Meyers Großes Konversations-Lexikon

  • Ageratum — Agerātum L., Pflanzengattg. der Kompositen (Amerika). A. conyzoīdes L. mit zierlichen blauen oder graublauen Blüten in Doldentrauben …   Kleines Konversations-Lexikon

  • Ageratum — Taxobox name = Ageratum image width = 200px image caption = Tropical Whiteweed ( Ageratum conyzoides ) regnum = Plantae divisio = Magnoliophyta classis = Magnoliopsida ordo = Asterales familia = Asteraceae tribus = Eupatorieae genus = Ageratum… …   Wikipedia

  • Ageratum —   Ageratum …   Wikipedia Español

  • Ageratum — Ageratum …   Wikipédia en Français

  • ageratum — /aj euh ray teuhm, euh jer euh /, n. 1. any of several composite plants of the genus Ageratum, esp. A. houstonianum, having heart shaped leaves and small, dense, blue, lavender, or white flower heads, often grown in gardens. 2. any of various… …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.