A volcano is a hill or
mountain with a hole where lava, rocks, or gas may be seen erupting from a
planet or moon's interior.
Detailed Definition:
A crack in the
earth's crust through which substances such as lava, steam, ashes, etc. are
released continually or sporadically. Volcanoes are known to exist on the
planets Mercury, Venus, Earth, the Moon, Mars, and the moon Io of Jupiter. Only
two of these bodies currently have active volcanoes: Earth and Io. However,
Venus or Europa, the moon of Jupiter, may have volcanoes erupting.
Etymology:
Volcano comes from the Latin Vulcanus, which
is the name of the fire god.
Sample Sentence(s):
The volcano's lava
was pouring down the mountainside.
On the seabed of
Jupiter's moon Europa, there has been volcanic activity.
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