As a verb: to beat into a thin leaf or plate of metal; to number the leaves of a book. As an adjective: having leaves or leaf-like structures; composed of thin layers.
From Latin 'foliatus' (having leaves), derived from 'folium' (leaf); used in metallurgy, bookbinding, and geology with related but distinct technical meanings.
Medieval metalworkers used 'foliate' to describe hammering gold into super-thin sheets so delicate light shines through—it's literally turning solid metal into something leaf-like!
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