Definition of lava tube in English:

lava tube

Line breaks: lava tube
(also lava tunnel)

noun

  • A natural tunnel within a solidified lava flow, formerly occupied by flowing molten lava.
    More example sentences
    • Channeled through a lava tube, the sea can roar and blow its spray as high as 50 feet.
    • As the lava flows onwards, this skin is left behind as a lava tunnel.
    • In 1996, the Italian army proved this by detonating 15,000 pounds of mining explosives to successfully block a lava tube leading from Mount Etna and threatening villages below.

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Word of the day grotesquerie
Pronunciation: grəʊˈtɛskəri
noun
grotesque quality or grotesque things collectively