| Lava (n.) The melted rock ejected by a volcano from its top or fissured sides. It flows out in streams sometimes miles in length. It also issues from fissures in the earth's surface, and forms beds covering many square miles, as in the Northwestern United States. Thesaurus Entries aa, abyssal rock, ash, ashes, basalt, bedrock, block lava, brand, brash, breccia, calx, carbon, charcoal, cinder, clinker, coal, coke, conglomerate, coom, crag, dross, druid stone, festooned pahoehoe, fume, gneiss, granite, igneous rock, limestone, living rock, magma, mantlerock, metamorphic rock, monolith, pahoehoe, pillow lava, porphyry, pudding stone, reek, regolith, rock, ropy lava, rubble, rubblestone, sandstone, sarsen, schist, scoria, scree, sedimentary rock, shelly pahoehoe, slag, smoke, smudge, smut, soot, stone, sullage, talus, tufa, tuff |