Question

where was the term arboretum was first used

Answer 1

The term arboretum was first used in an English publication by John Claudius Loudon in 1833 in The Gardener's Magazine but the conceptwas already long-established by then.

Answer 2

the term arboretum was first used in an english publication by john claudius loudon in 1883 in the gardeners magazine but the concept was long published by them.