| pillow lava n. Lava that forms from an underwater eruption and is characterized by pillow-shaped masses. |
pillow lava (p l  ) Lava that forms from an underwater eruption and is characterized by pillow-shaped masses. Pillow lava forms when hot lava is suddenly exposed to cold water, forming a sacklike membrane that is filled with additional cooling and solidifying lava. The outer membrane is usually finer grained than the inner lava. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | pillow lava - lava that hardened in rounded shapes suggestive of pillows; believed to result from underwater eruptions lava - rock that in its molten form (as magma) issues from volcanos; lava is what magma is called when it reaches the surface |
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