Ageratum

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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 dense clusters.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  ageratum
       n 1: rhizomatous plant of central and southeastern United States
            and West Indies having large showy heads of clear blue
            flowers; sometimes placed in genus Eupatorium [syn: {mistflower},
             {mist-flower}, {Conoclinium coelestinum}, {Eupatorium
            coelestinum}]
       2: any plant of the genus Ageratum having opposite leaves and
          small heads of blue or white flowers