ageratum

ag·er·a·tum

A0139300 (ăj′ə-rā′təm)n.1. Any of various tropical American plants of the genus Ageratum in the composite family, especially A. houstonianum, cultivated for their fluffy blue, purple, pink, or white flower heads.2. Any of several other plants having flower clusters similar to those of ageratum.

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[New Latin Agēratum, genus name, from Greek agēraton, a plant (perhaps a type of rosemary), neuter of agēratos, ageless : a-, without; see a-¹ + gēras, old age; see gerə- in Indo-European roots.]

ageratum

(ˌædʒəˈreɪtəm) n (Plants) 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]

ag•er•a•tum

(ˌædʒ əˈreɪ təm, əˈdʒɛr ə-)

n. any of several low-growing composite plants of the genus Ageratum, having heart-shaped leaves and dense, blue or white flower heads. [1560–70; < New Latin; Latin agēraton < Greek agḗraton, neuter of agḗratos unaging]

Thesaurus

Noun	1.	ageratum - rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus EupatoriumConoclinium coelestinum, Eupatorium coelestinum, mistflower, mist-flowerflower - a plant cultivated for its blooms or blossomsConoclinium, genus Conoclinium - mistflower
	2.	ageratum - any plant of the genus Ageratum having opposite leaves and small heads of blue or white flowersflower - a plant cultivated for its blooms or blossomsgenus Ageratum - genus of tropical American herbs grown for their flowersAgeratum houstonianum, common ageratum - small tender herb grown for its fluffy brushlike blue to lavender blooms