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L'AVA, noun [probably from flowing, and from the root of Latin fluo, or lavo.]

1. A mass or stream of melted minerals or stony matter which bursts or is thrown from the mouth or sides of a volcano, and is sometimes ejected in such quantities as to overwhelm cities. Catana, at the foot of Etna, has often been destroyed by it, and in 1783, a vast tract of land in Iceland was overspread by an eruption of lava from mount Hecla.

2. The same matter when cool and hardened.