Colloid Meaning and Definition
Colloid
Pronunciation
/ˈkɒlɔɪd/
Part of Speech
Noun
Definition
A substance in which a solid is evenly distributed in a liquid or a gas, typically requiring external energy to maintain its uniform state.
Examples
- The cream was a colloid of milk, sugar, and flavorings.
- Zirconia is a type of colloid that is used in ceramics.
Synonyms
- Mixture
- Suspension
Antonyms
- Crystal
- Precipitate
Additional Information
Colloids can be found naturally in food, such as milk, cream, and fruit juices, or can be artificially created through chemical reactions. They have various industrial and biomedical applications, including pharmaceuticals, cosmetics, and food processing.
Colloids are also used in medical imaging techniques, such as ultrasound and MRI, where the uniformity of the substance helps to enhance image quality.
In some cases, colloids can be stabilized through the use of surfactants, which reduce the surface tension between the solid and liquid components, allowing them to remain evenly distributed.
Etymology
The word “colloid” comes from the Greek word “” (kóllōidos), meaning “glued-together”, and was first coined in the late 19th century by the German chemist Zachary Richard.
Usage Notes
When using the term “colloid”, it is essential to specify whether it refers to a liquid-solid or gas-solid mixture, as the characteristics and properties of the colloid can vary significantly depending on the type of mixture.
Cultural References
In popular culture, colloids are often featured in science fiction and fantasy stories, such as the “Star Trek” series, where colloidal suspensions are used to create advanced technologies.
Idiomatic Expressions or Phrases
There are no idiomatic expressions or phrases that specifically include the word “colloid”, but it can be used in various scientific and technical contexts to describe specific phenomena.
Related Words or Phrases
- Solution
- Mixture
- Suspension
Collocations
- Colloid chemistry
- Colloidal dispersions
Frequency of Use
The term “colloid” is relatively uncommon in everyday language, but it is widely used in scientific and technical contexts.
Common Misspellings
- Colide
- Collectoid