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# igneous

«igneous» in Mova's school dictionary: **rock formed when hot melted rock (magma or lava) cools…** — its meaning for a pupil, its sense in the lessons and examples, with 4 sentences of Mova's corpora that use it.

### part of speech

adjective (igneous)

### meaning for a pupil

1) Igneous rock is rock formed when hot melted rock (magma or lava) cools and becomes hard. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/igneous/#m1)

2) Igneous can describe anything to do with fire or volcanoes (rare). [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/igneous/#m2)

### sense in the lessons

In science (geology) it is one of the three main kinds of rock: igneous, sedimentary and metamorphic. Pupils learn that granite and basalt are igneous and that fast cooling gives small crystals, slow cooling gives big crystals. Phrases: igneous rock, extrusive/intrusive igneous rock.

### examples

- Granite is an igneous rock. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/igneous/#x1)
- Igneous rocks form from cooled lava or magma. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/igneous/#x2)
- Basalt is a dark igneous rock from volcanoes. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/igneous/#x3)
- Pumice is an igneous rock so light it can float. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/igneous/#x4)
- We sorted our rocks into igneous, sedimentary and metamorphic. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/igneous/#x5)
- Igneous rock that cools slowly underground has large crystals. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/igneous/#x6)
- The volcano left a layer of igneous rock. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/igneous/#x7)
- Is obsidian igneous? Yes, it is volcanic glass. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/igneous/#x8)

### note

Starts with a vowel: "an igneous rock". Pronounced IG-nee-us. Comes from Latin "ignis" = fire (like "ignite"). Not used for people. Myth: not all igneous rock comes from volcanoes above ground; some cools deep underground.

### In the corpora

- [Igneous rocks form when molten rock cools and hardens.](https://md.mova.elamur.ai/free/en/corpora/school/geography/48-igneous-rocks-and-the-rock-cycle/5/)
- [Granite is a speckled igneous rock with big crystals of quartz, feldspar and mica, formed deep underground.](https://md.mova.elamur.ai/free/en/corpora/school/geography/48-igneous-rocks-and-the-rock-cycle/7/)
- [Basalt is a dark, fine-grained igneous rock made from runny lava and is the most common rock of the ocean floor.](https://md.mova.elamur.ai/free/en/corpora/school/geography/48-igneous-rocks-and-the-rock-cycle/9/)
- [All rocks belong to three families: igneous, sedimentary and metamorphic.](https://md.mova.elamur.ai/free/en/corpora/school/geography/48-igneous-rocks-and-the-rock-cycle/12/)

### Trees and pragmatics

[Every meaning and example of «igneous» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/igneous/), each sentence with its dependency tree and frames.