arboretum
noun [ C ] uk/ˌɑː.bərˈiː.təm/ us/ˌɑːr.bərˈiː.t̬əm/ arboretums or arboreta
（供科学实验或教育用的）植物园
a large garden where many types of tree are grown, for people to look at and to be studied for scientific purposes
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