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arboretum (noun) a large garden where a wide variety of trees and plants are grown for exhibition, or for study.
A vast area in which a wide variety of species of trees, plants, and shrubs are grown for show or for scientific study is called an arboretum. Variety is important in an arboretum because only then is an exhaustive study possible.
- The arboretum in Southern California is a real feast to the eyes, and is also of special interest to the botanist, because of some rare specimens of plants and trees there.
- The number of trees and plants in the arboretum is not that high, but it does have a wide variety of species, so researchers find it a botanist's paradise.