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acclivitous

adjective
ac·​cliv·​i·​tous | \ əˈklivətəs, (ˈ)a¦k-\

Definition of acclivitous

: sloping upward

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First Known Use of acclivitous

1803, in the meaning defined above

History and Etymology for acclivitous

acclivity + -ous

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The first known use of acclivitous was in 1803

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