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1. Bearing numerous leaves; leafy.
2. Of, relating to, or resembling a leaf.
3. Of or relating to a lichen whose thallus is flat and leafy.
[Latin foliōsus, from folium, leaf; see folium.]
[C18: from Latin foliōsus full of leaves]
2. having a leaflike thallus loosely attached to a surface, as certain lichens. Compare crustose, fruticose.