Definition of acacias:
(n) :
(countable) A shrub or tree of the tribe Acacieae.
(n) :
(uncountable, pharmacy) The thickened or dried juice of several species in Acacieae, in particular Vachellia nilotica (syn. Acacia nilotica, Egyptian acacia).
(n) :
(uncountable) Gum arabic; gum acacia.
(n) :
A false acacia; robinia tree (Robinia pseudoacacia).
(n) :
(loosely) Any of several related trees, such as a locust tree.
(n) :
A light to moderate greenish yellow with a hint of red.