Locust tree \Lo"cust tree`\ [Etymol. uncertain.]

(Bot.) A large North American tree of the genus Robinia (R. Pseudacacia), producing large slender racemes of white, fragrant, papilionaceous flowers, and often cultivated as an ornamental tree. In England it is called acacia.

Note: The name is also applied to other trees of different genera, especially to those of the genus Hymen[ae]a, of which H. Courbaril is a lofty, spreading tree of South America; also to the carob tree (Ceratonia siliqua), a tree growing in the Mediterranean region.

Honey locust tree (Bot.), a tree of the genus Gleditschia ) G. triacanthus), having pinnate leaves and strong branching thorns; -- so called from a sweet pulp found between the seeds in the pods. Called also simply honey locust.

Water locust tree (Bot.), a small swamp tree (Gleditschia monosperma), of the Southern United States.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Acacia \A*ca"ci*a\, n. (Antiq.) A roll or bag, filled with dust, borne by Byzantine emperors, as a memento of mortality. It is represented on medals.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Acacia \A*ca"cia\, n.; pl. E. Acacias, L. Acaci[ae]. [L. from Gr. ?; orig. the name of a thorny tree found in Egypt; prob. fr. the root ak to be sharp. See Acute.]

1. A genus of leguminous trees and shrubs. Nearly 300 species are Australian or Polynesian, and have terete or vertically compressed leaf stalks, instead of the bipinnate leaves of the much fewer species of America, Africa, etc. Very few are found in temperate climates.

2. (Med.) The inspissated juice of several species of acacia; -- called also gum acacia, and gum arabic.

Source: Webster's Revised Unabridged Dictionary (1913)