# quark

/ˈkwɑɹk/ (US) · /kwˈɑːk/ (UK)

Source: https://englishreference.com/word/quark
Updated: 2026-08-08

## Senses

### 1. physics particle

noun · CEFR C1 · Technical

a tiny part of an atom that is smaller than a proton or neutron.

For teachers: an elementary subatomic particle that carries a fractional electric charge and serves as a fundamental constituent of matter.

- Scientists study how quarks join together to form the center of an atom.
- In the Standard Model of particle physics, quarks are considered fundamental entities that never appear in isolation under normal conditions.

Usage: Usually used in the plural when discussing the composition of matter.

### 2. soft cheese

noun · CEFR B2

a soft, white, creamy cheese that is popular in Europe.

For teachers: a type of fresh, unripened cheese made from cow's milk, characterized by a mild flavour and smooth texture.

- You can use quark instead of cream cheese to make a healthier cake.
- The recipe calls for five hundred grams of low-fat quark, which provides a distinctively tangy profile compared to traditional heavy cream.

### 3. computing identifier

noun · CEFR C2 · Technical

a number used by a computer program to represent a specific piece of text.

For teachers: an integer that uniquely identifies a specific text string within a software environment.

- The system assigns a quark to each unique name to save memory.
- By mapping frequently used strings to unique quarks, the developer significantly reduced the overhead of string comparison operations within the kernel.

## Examples

- Scientists study how each quark moves inside a proton.
- Physicists use massive particle accelerators to observe the behavior of a quark during high-energy collisions.
- The standard model of particle physics identifies six distinct flavors of quark, which interact via the strong force mediated by the exchange of gluons.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.