名詞 lava:

1. rock that in its molten form (as magma) issues from volcanos; lava is what magma is called when it reaches the surface

1. The volcano spewed molten lava.
   火山噴出了熔巖。
2. A volcano emits smoke, lava and ashes.
   火山噴射出煙、 熔巖和灰燼。
3. The volcano spurted (out) molten lava.
   火山噴出了熔巖。
4. A light, porous, glassy lava, used in solid form as an abrasive and in powdered form as a polish and an abrasive.
   輕石，浮石一種在固體狀時用作研磨物且粉狀時用作磨光物和研磨物的輕多孔火山巖
5. I've seen the stream of lava from a volcano.
   我見過火山噴發(fā)出的熔巖流。

la.va

n.（名詞）
Molten rock that reaches the earth`s surface through a volcano or fissure.
火山巖：通過火山口或裂縫溢出地表的巖石融化物
The rock formed by the cooling and solidifying of molten rock.
熔巖：融化的巖石冷卻凝固后形成的巖石

來源：
Italian
意大利語
perhaps from Latin l3bôs [fall]
可能源自 拉丁語 l3bôs [掉落]
from Latin l3bo [to fall]
源自 拉丁語 l3bo [落下]

<注釋>Lava was appropriately named by people living near Mount Vesuvius.The only active volcano on the European mainland, Vesuvius has erupted frequently since Pompeii and Herculaneum were buried by it ina.d. 79. The Neapolitans who lived in the vicinity took a word in Italian,lava, meaning .a stream caused suddenly by rain,. and applied it to the streams of molten rock coming down the sides of Vesuvius. The term was then taken into Standard Italian,where it came to mean the rock in both its molten and its solidified states.The Italian word in all its senses was borrowed into English around the middle of the 8th century (750 being the earliest date of record).
火山巖這一恰當?shù)拿Q是由生活在維蘇威火山附近的居民命名的。維蘇威火山是歐洲大陸唯一的活火山，自從公元 79年龐貝和赫庫蘭尼姆被它埋沒以來，它一直頻繁爆發(fā)。 生活在附近的那不勒斯人用意大利語中的一個單詞lava 指代從維蘇威火山上流淌下來的熔化巖石流，而這個詞的本意是.由雨水驟然形成的溪流.。 這一詞語被納入標準意大利語，意為處于熔化或凝固狀態(tài)的巖石。大約在8世紀中期，這一意大利單詞和其含義都被借用到英語之中（最早的記錄見于750年）