---
title: dioxide — school dictionary · trees and pragmatics
description: «dioxide» in the school dictionary: A dioxide is a chemical substance whose molecules have two oxygen atoms joined to another atom. Every meaning for a pupil with its dependency tree and pragmatics.
---

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# dioxide

<!-- .vintro -->
**Who acts:** dioxide, molecules, people, We, Plants, bubbles · **What happens:** be, have, join, use, mean, breathe out · **To what, where:** chemical substance, two oxygen atoms, it, carbon dioxide, gas, oxygen

<!-- .vabout -->
«dioxide» in the school dictionary: its 2 meanings for a pupil and its 8 examples, every sentence parsed by Mova itself — its syntax tree, a dependency tree in the style of Universal Dependencies, and its pragmatics clause by clause. The word in the dictionary, with its sense in the lessons: [dioxide in the school dictionary](https://md.mova.elamur.ai/free/en/dictionaries/school/w/dioxide.md).

## Meaning 1 {#m1}

<!-- .ven lang=en -->
A dioxide is a chemical substance whose molecules have two oxygen atoms joined to another atom.

<!-- fold The tree, 16 words -->
```conllu
# sent_id = dict:school:dioxide:m1:1
# text = A dioxide is a chemical substance whose molecules have two oxygen atoms joined to another atom.
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	dioxide	dioxide	NOUN	NN	Number=Sing	6	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
5	chemical	chemical	ADJ	JJ	Degree=Pos	6	amod	_	_
6	substance	substance	NOUN	NN	Number=Sing	0	root	_	_
7	whose	whose	PRON	WP$	Poss=Yes|PronType=Rel	8	nmod:poss	_	_
8	molecules	molecule	NOUN	NNS	Number=Plur	9	nsubj	_	_
9	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	6	acl:relcl	_	_
10	two	two	NUM	CD	NumForm=Word|NumType=Card	12	nummod	_	_
11	oxygen	oxygen	NOUN	NN	Number=Sing	12	compound	_	_
12	atoms	atom	NOUN	NNS	Number=Plur	9	obj	_	_
13	joined	join	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	12	acl	_	_
14	to	to	ADP	IN	_	16	case	_	_
15	another	another	DET	DT	PronType=Ind	16	det	_	_
16	atom	atom	NOUN	NN	Number=Sing	13	obl	_	SpaceAfter=No
17	.	.	PUNCT	.	_	6	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | a dioxide | a chemical substance |  |  |  |  | tree rules |
| 2 | **have** | present | molecules | two oxygen atoms |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent atom=Patient |
| 3 | **join** | participle |  | two oxygen atoms *not said here* |  |  |  | to another atom | vn mix-22.1-2-1 «NP V PP.patient»: agent=Patient to atom=Co-Patient |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## Meaning 2 {#m2}

<!-- .ven lang=en -->
In everyday use it almost always means carbon dioxide (CO₂), the gas that people and animals breathe out.

<!-- fold The tree, 19 words -->
```conllu
# sent_id = dict:school:dioxide:m2:1
# text = In everyday use it almost always means carbon dioxide (CO₂), the gas that people and animals breathe out.
1	In	in	SCONJ	IN	_	3	mark	_	_
2	everyday	everyday	ADJ	JJ	Degree=Pos	3	amod	_	_
3	use	use	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	7	advcl	_	_
4	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	obj	_	_
5	almost	almost	ADV	RB	_	6	advmod	_	_
6	always	always	ADV	RB	PronType=Tot	3	advmod	_	_
7	means	mean	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	carbon	carbon	NOUN	NN	Number=Sing	9	compound	_	_
9	dioxide	dioxide	NOUN	NN	Number=Sing	7	obj	_	_
10	(	(	PUNCT	-LRB-	_	12	punct	_	SpaceAfter=No
11	CO	CO	PROPN	NNP	Number=Sing	12	compound	_	SpaceAfter=No
12	₂	₂	NOUN	NN	Number=Sing	9	appos	_	SpaceAfter=No
13	)	)	PUNCT	-RRB-	_	12	punct	_	SpaceAfter=No
14	,	,	PUNCT	,	_	16	punct	_	_
15	the	the	DET	DT	Definite=Def|PronType=Art	16	det	_	_
16	gas	gas	NOUN	NN	Number=Sing	9	appos	_	_
17	that	that	SCONJ	IN	_	21	mark	_	_
18	people	people	NOUN	NNS	Number=Plur	21	nsubj	_	_
19	and	and	CCONJ	CC	_	20	cc	_	_
20	animals	animal	NOUN	NNS	Number=Plur	18	conj	_	_
21	breathe	breathe	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	16	acl:relcl	_	_
22	out	out	ADP	RP	_	21	compound:prt	_	SpaceAfter=No
23	.	.	PUNCT	.	_	7	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **use** | present |  | it |  |  |  | always *property* | vn eat-39.1 «NP V NP»: agent=Agent it=Patient |
| 2 | **mean** | present |  | carbon dioxide |  |  |  |  | vn intend-61.2-1 «NP V NP»: agent=Agent dioxide=Topic |
| 3 | **breathe out** | present | people and animals | the gas *not said here* |  |  |  |  | vn breathe-40.1.2-1 «NP V NP»: agent=Agent gas=Theme |

## Example 1 {#x1}

<!-- .ven lang=en -->
We breathe out carbon dioxide.

```conllu
# sent_id = dict:school:dioxide:x1:1
# text = We breathe out carbon dioxide.
1	We	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	2	nsubj	_	_
2	breathe	breathe	VERB	VBP	Mood=Ind|Number=Plur|Person=1|Tense=Pres|VerbForm=Fin	0	root	_	_
3	out	out	ADP	RP	_	2	compound:prt	_	_
4	carbon	carbon	NOUN	NN	Number=Sing	5	compound	_	_
5	dioxide	dioxide	NOUN	NN	Number=Sing	2	obj	_	SpaceAfter=No
6	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **breathe out** | present | We | carbon dioxide |  |  |  |  | vn breathe-40.1.2-1 «NP V NP»: agent=Agent dioxide=Theme |

## Example 2 {#x2}

<!-- .ven lang=en -->
Plants take in carbon dioxide and give out oxygen.

```conllu
# sent_id = dict:school:dioxide:x2:1
# text = Plants take in carbon dioxide and give out oxygen.
1	Plants	plant	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	take	take	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	in	in	ADP	RP	_	2	compound:prt	_	_
4	carbon	carbon	NOUN	NN	Number=Sing	5	compound	_	_
5	dioxide	dioxide	NOUN	NN	Number=Sing	2	obj	_	_
6	and	and	CCONJ	CC	_	7	cc	_	_
7	give	give	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	_
8	out	out	ADP	RP	_	7	compound:prt	_	_
9	oxygen	oxygen	NOUN	NN	Number=Sing	7	obj	_	SpaceAfter=No
10	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **take in** | present | Plants | carbon dioxide |  |  |  |  | vn bring-11.3 «NP V NP»: agent=Agent dioxide=Theme |
| 2 | **give out** | present | Plants *not said here* | oxygen |  |  |  |  | vn contribute-13.2 «NP V NP.theme (PP)»: agent=Agent oxygen=Theme |

## Example 3 {#x3}

<!-- .ven lang=en -->
The bubbles in lemonade are carbon dioxide.

```conllu
# sent_id = dict:school:dioxide:x3:1
# text = The bubbles in lemonade are carbon dioxide.
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	bubbles	bubble	NOUN	NNS	Number=Plur	7	nsubj	_	_
3	in	in	ADP	IN	_	4	case	_	_
4	lemonade	lemonade	NOUN	NN	Number=Sing	2	nmod	_	_
5	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	7	cop	_	_
6	carbon	carbon	NOUN	NN	Number=Sing	7	compound	_	_
7	dioxide	dioxide	NOUN	NN	Number=Sing	0	root	_	SpaceAfter=No
8	.	.	PUNCT	.	_	7	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | the bubbles in lemonade | carbon dioxide |  |  |  |  | tree rules |

## Example 4 {#x4}

<!-- .ven lang=en -->
Burning coal makes carbon dioxide.

```conllu
# sent_id = dict:school:dioxide:x4:1
# text = Burning coal makes carbon dioxide.
1	Burning	burn	VERB	VBG	VerbForm=Ger	3	csubj	_	_
2	coal	coal	NOUN	NN	Number=Sing	1	obj	_	_
3	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	carbon	carbon	NOUN	NN	Number=Sing	5	compound	_	_
5	dioxide	dioxide	NOUN	NN	Number=Sing	3	obj	_	SpaceAfter=No
6	.	.	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **burn** | gerund |  | coal |  |  |  |  | vn light\_emission-43.1 «NP V NP.theme»: agent=Agent coal=Theme |
| 2 | **make** | present | Burning | carbon dioxide |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset dioxide=Product |

## Example 5 {#x5}

<!-- .ven lang=en -->
Carbon dioxide is written CO₂.

```conllu
# sent_id = dict:school:dioxide:x5:1
# text = Carbon dioxide is written CO₂.
1	Carbon	carbon	NOUN	NN	Number=Sing	2	compound	_	_
2	dioxide	dioxide	NOUN	NN	Number=Sing	4	nsubj:pass	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	aux:pass	_	_
4	written	write	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
5	CO	CO	PROPN	NNP	Number=Sing	6	compound	_	SpaceAfter=No
6	₂	₂	NOUN	NN	Number=Sing	4	obj	_	SpaceAfter=No
7	.	.	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **write** | present · passive |  | Carbon dioxide |  |  |  |  | vn transfer\_mesg-37.1.1-1-1 «NP V NP-Dative NP»: subject=Recipient ₂=Topic |

## Example 6 {#x6}

<!-- .ven lang=en -->
Too much carbon dioxide warms the planet.

```conllu
# sent_id = dict:school:dioxide:x6:1
# text = Too much carbon dioxide warms the planet.
1	Too	too	ADV	RB	_	2	advmod	_	_
2	much	much	ADJ	JJ	Degree=Pos	4	amod	_	_
3	carbon	carbon	NOUN	NN	Number=Sing	4	compound	_	_
4	dioxide	dioxide	NOUN	NN	Number=Sing	5	nsubj	_	_
5	warms	warm	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	planet	planet	NOUN	NN	Number=Sing	5	obj	_	SpaceAfter=No
8	.	.	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **warm** | present | much carbon dioxide | the planet |  |  |  |  | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent planet=Patient |

## Example 7 {#x7}

<!-- .ven lang=en -->
Volcanoes give off sulphur dioxide.

```conllu
# sent_id = dict:school:dioxide:x7:1
# text = Volcanoes give off sulphur dioxide.
1	Volcanoes	volcano	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	give	give	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	off	off	ADP	RP	_	2	compound:prt	_	_
4	sulphur	sulphur	NOUN	NN	Number=Sing	5	compound	_	_
5	dioxide	dioxide	NOUN	NN	Number=Sing	2	obj	_	SpaceAfter=No
6	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **give off** | present | Volcanoes | sulphur dioxide |  |  |  |  | vn substance\_emission-43.4 «NP V NP»: agent=Source dioxide=Theme |

## Example 8 {#x8}

<!-- .ven lang=en -->
A candle in a jar goes out when oxygen runs low.

```conllu
# sent_id = dict:school:dioxide:x8:1
# text = A candle in a jar goes out when oxygen runs low.
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	candle	candle	NOUN	NN	Number=Sing	6	nsubj	_	_
3	in	in	ADP	IN	_	5	case	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	jar	jar	NOUN	NN	Number=Sing	2	nmod	_	_
6	goes	go	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
7	out	out	ADP	RP	_	6	compound:prt	_	_
8	when	when	ADV	WRB	PronType=Int	10	advmod	_	_
9	oxygen	oxygen	NOUN	NN	Number=Sing	10	nsubj	_	_
10	runs	run	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	advcl	_	_
11	low	low	ADV	RB	Degree=Pos	10	advmod	_	SpaceAfter=No
12	.	.	PUNCT	.	_	6	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **go out** | present | a candle in a jar |  |  |  |  |  | vn interact-36.6 «NP V»: agent=Agent |
| 2 | **run** | present | oxygen |  |  |  |  | low *property* | vn run-51.3.2-2-1 «NP V»: agent=Theme |

<!-- div src -->

**Text:** the school dictionary of Mova's schools (`world/data/dictionary-schools/`), written for Mova. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each meaning and example read on its own. Elamur Cosmic License.

<!-- /div -->

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