Definition

1. Noun:
   • Any of a class of alcohols having 2 hydroxyl groups in each molecule: A glycol is a type of organic chemical compound belonging to the diol family, characterized by the presence of two hydroxyl (-OH) groups attached to different carbon atoms.
   • A sweet but poisonous syrupy liquid used as an antifreeze and solvent: Specifically, this often refers to ethylene glycol, a common, colorless, odorless, viscous liquid with a sweet taste that is highly toxic. It is widely utilized in automotive antifreeze and as an industrial solvent.

Usage Examples

• Noun:
  • The chemist synthesized a new glycol for the polymer experiment. (Referring to the chemical class)
  • The mechanic warned that glycol from a leaking radiator is dangerous for pets. (Referring specifically to ethylene glycol as antifreeze)
  • Propylene glycol is considered less toxic than ethylene glycol and is used in food and pharmaceuticals.

Advanced Usage

• "Glycol ether": A class of solvents based on glycol, commonly used in paints, inks, and cleaners.

  • The formulation uses a glycol ether to improve the flow of the paint.

• "Glycol dehydration": An industrial process to remove water from natural gas using a glycol solution.

  • The gas plant uses a glycol dehydration unit to meet pipeline specifications.

Variants and Related Words

• Ethylene glycol (n): The most common type, used primarily as antifreeze.

  • Ethylene glycol lowers the freezing point of water in a car's cooling system.

• Propylene glycol (n): A less toxic glycol used in food processing, cosmetics, and pharmaceuticals.

  • Propylene glycol is a common humectant in lotions and electronic cigarette liquid.

• Diethylene glycol (n): A compound with similar structure and uses, but involved in notable poisoning incidents.

• Glycerol/Glycerin (n): A related compound with three hydroxyl groups (a triol), not a glycol.

Synonyms

• Diol: The general chemical term for a compound containing two hydroxyl groups.
• Antifreeze agent: When referring to its primary application (specifically for ethylene glycol).

Related Phrases and Compounds

• Glycol-based: Describing a product or fluid whose main ingredient is a glycol.

  • The aircraft uses a glycol-based de-icing fluid on its wings.

• Glycol coolant: Another term for antifreeze made with glycol.

  • Remember to flush and replace the glycol coolant every two years.

Noun

1. any of a class of alcohols having 2 hydroxyl groups in each molecule
2. a sweet but poisonous syrupy liquid used as an antifreeze and solvent