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# pumice

«pumice» in Mova's school dictionary: **a very light, rough grey rock full of tiny holes, made…** — its meaning for a pupil, its sense in the lessons and examples, with 2 sentences of Mova's corpora that use it.

### part of speech

noun (pumice — uncountable; a pumice stone, pumice stones)

### meaning for a pupil

1) Pumice is a very light, rough grey rock full of tiny holes, made when frothy lava from a volcano cools quickly; it can float on water. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/P/pumice/#m1)

2) A pumice stone is a piece of this rock used to rub away hard skin, for example on your feet. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/P/pumice/#m2)

### sense in the lessons

In science lessons on rocks, pumice is an igneous rock formed from volcanic lava; because it is full of gas bubbles, it floats — a surprising fact for a rock. After some eruptions, rafts of floating pumice drift on the sea. In everyday life, pumice stones are in bathrooms. Common phrases: «pumice stone», «a raft of pumice», «floating pumice».

### examples

- Pumice is the only rock that floats on water. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/P/pumice/#x1)
- Pumice forms when bubbly lava cools very quickly. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/P/pumice/#x2)
- Nan uses a pumice stone on her heels. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/P/pumice/#x3)
- After the eruption, a raft of pumice floated across the Pacific. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/P/pumice/#x4)
- We tested rocks in water, and the pumice floated. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/P/pumice/#x5)
- Pumice is rough, light and full of holes. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/P/pumice/#x6)
- Some toothpastes and cleaners contain powdered pumice. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/P/pumice/#x7)

### note

Uncountable as a material; «a pumice stone» for one piece. Say PUM-iss. Strictly, not every pumice floats for ever — it sinks when its holes fill with water.

### In the corpora

- [Pumice is a volcanic rock so full of gas bubbles that it can float on water.](https://md.mova.elamur.ai/free/en/corpora/school/geography/48-igneous-rocks-and-the-rock-cycle/11/)
- [Lava full of gas bubbles can cool quickly into rock with many small holes, such as pumice.](https://md.mova.elamur.ai/free/en/corpora/school/world/61-rocks-minerals-fossils/12/)

### Trees and pragmatics

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