decade-long

adjective
de·​cade-long | \ ˈde-ˌkād-ˌlȯŋ How to pronounce decade-long (audio) \
variants: or less commonly decadelong

Definition of decade-long

: lasting or occuring over a decade or about a decade A decade-long drought in Saskatchewan and Alberta nesting areas has cut sharply into the number of birds migrating into Idaho …— Dan Knauss The renegade gene that causes Huntington's disease has been found after a decade-long search …— Daniel Q. Haney

First Known Use of decade-long

1974, in the meaning defined above

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