Definition

Noun: A colloidal gel is a type of colloid that exists in a more solid, jelly-like state. It is a semi-solid mixture where a solid or liquid is dispersed within a solid medium, resulting in a substance that is rigid enough to hold its shape but may still flow over long periods.

Usage

The term is used in scientific contexts, particularly in chemistry, materials science, and biology, to describe substances with specific structural properties. - The laboratory synthesized a new colloidal gel for use in drug delivery systems. - Agar is a common colloidal gel used to culture bacteria in petri dishes.

Advanced Usage

• "To form a colloidal gel": Describes the process where a sol (a fluid colloidal system) transitions into a gel state.
  • When cooled, the solution will form a colloidal gel.
• Used attributively to modify other nouns, indicating a gel-like form or property.
  • The colloidal gel structure provides excellent stability.

Variants and Related Words

• Gel (n.): A broader term for a semi-solid colloidal system. A colloidal gel is a specific type of gel.
• Sol (n.): A fluid colloidal system, which is the liquid counterpart to a more solid gel.
• Colloid (n.): The general class of mixtures where one substance is dispersed evenly throughout another.
• Gelation (n.): The process of forming a gel.

Synonyms

• Jelly
• Gel
• Semi-solid colloid

Related Phrases

• Thermoreversible gel: A colloidal gel that can melt upon heating and reform upon cooling.
• Hydrogel: A colloidal gel in which water is the dispersion medium.

Related Idioms

(This scientific term is not commonly used in idiomatic expressions.)

Noun

1. a colloid in a more solid form than a sol