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Definition of Folium
1. Noun. A thin layer or stratum of (especially metamorphic) rock. 
Definition of Folium
1. n. A leaf, esp. a thin leaf or plate.
Definition of Folium
1. a thin layer [n -LIA or -LIUMS]
Medical Definition of Folium
1. 
Origin: L, a leaf.
1. A leaf, especially. A thin leaf or plate.
2. 



