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glycol: meaning, definition, pronunciation and examples

C1-C2 / Low-Frequency / Technical
UK/ˈɡlaɪkɒl/US/ˈɡlaɪkɑːl/

Technical / Scientific / Industrial

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Quick answer

What does “glycol” mean?

A colourless, sweet-tasting, viscous liquid that is chemically an alcohol with two hydroxyl groups, primarily referring to ethylene glycol or propylene glycol.

Audio

Pronunciation

Definition

Meaning and Definition

A colourless, sweet-tasting, viscous liquid that is chemically an alcohol with two hydroxyl groups, primarily referring to ethylene glycol or propylene glycol.

Any of a class of organic compounds belonging to the diols, used as antifreeze agents, solvents, and in the manufacture of polymers like polyester. In more general technical use, it can refer to similar compounds (e.g., butylene glycol) used in cosmetics and food.

Dialectal Variation

British vs American Usage

Differences

No significant differences in meaning or application. Spelling is identical. Regional variations may exist in specific industrial standards or product formulations, but the term itself is standardized.

Connotations

Identical technical connotations. Colloquially, both associate it with car maintenance (antifreeze) or, increasingly, with vaping liquids (propylene glycol).

Frequency

Equally low-frequency in general discourse. Slightly higher frequency in American English in contexts like 'propylene glycol' in food/cosmetic ingredient lists due to labelling regulations.

Grammar

How to Use “glycol” in a Sentence

[compound] + glycol (e.g., ethylene glycol)glycol + [application] (e.g., glycol antifreeze)glycol + [process] (e.g., glycol dehydration)glycol + [property] (e.g., glycol concentration)

Vocabulary

Collocations

strong
ethylene glycolpropylene glycolpolyethylene glycolantifreeze glycolglycol mixture
medium
glycol solutionglycol concentrationglycol systemglycol recoveryglycol dehydration
weak
based on glycolcontains glycolpure glycolspilled glycol

Examples

Examples of “glycol” in a Sentence

adjective

British English

  • The glycol-based coolant is more effective.
  • A glycol recovery unit was installed.

American English

  • The glycol-based antifreeze is on sale.
  • Glycol dehydration is a standard process.

Usage

Meaning in Context

Business

Used in procurement, safety data sheets, and logistics for chemical and manufacturing industries. E.g., 'The quarterly order for propylene glycol has been delayed.'

Academic

Core term in chemistry, chemical engineering, and materials science papers. E.g., 'The reaction was catalyzed in a polyethylene glycol medium.'

Everyday

Almost exclusively in contexts of car maintenance or checking product ingredients. E.g., 'I need to top up the glycol in the car's cooling system.'

Technical

Precise term in formulations, process engineering (e.g., gas dehydration), HVAC systems, and pharmaceutical production. E.g., 'The glycol loop maintains the process temperature.'

Vocabulary

Synonyms of “glycol”

Strong

ethylene glycol (for the specific common compound)

Neutral

diol (technical)antifreeze agent (in context)

Weak

coolant (functional, but not chemically precise)antifreeze (functional product)

Vocabulary

Antonyms of “glycol”

None (as a specific chemical class). Contextual: 'water (as a pure coolant)', 'non-glycol-based antifreeze'.

Watch out

Common Mistakes When Using “glycol”

  • Misspelling: 'glicol', 'glycole'.
  • Mispronunciation: /ˈglɪkəl/ (should stress first syllable, long 'i').
  • Using 'glycol' as a countable noun for types: 'three glycols' is technically correct but highly specialist; better: 'three types of glycol'.
  • Confusing 'glycol' with 'glycerol' (a different triol compound).

FAQ

Frequently Asked Questions

Not exactly. Ethylene glycol is the primary active ingredient in most traditional antifreeze formulations. 'Antifreeze' is the end-product, while 'glycol' refers to the specific chemical compound.

Propylene glycol is generally recognized as safe (GRAS) by food and drug authorities for use in foods, cosmetics, and pharmaceuticals at specified levels, unlike its more toxic cousin ethylene glycol.

Glycol-based fluids are used for de-icing aeroplane wings before take-off in winter conditions because they lower the freezing point of water and help melt and prevent ice formation.

Rarely. As an uncountable noun for the substance ('spill glycol'), it has no plural. As a countable noun referring to types of diols ('the two glycols were compared'), it is used only in highly technical writing.

A colourless, sweet-tasting, viscous liquid that is chemically an alcohol with two hydroxyl groups, primarily referring to ethylene glycol or propylene glycol.

Glycol is usually technical / scientific / industrial in register.

Glycol: in British English it is pronounced /ˈɡlaɪkɒl/, and in American English it is pronounced /ˈɡlaɪkɑːl/. Tap the audio buttons above to hear it.

Phrases

Idioms & Phrases

  • “None. Too technical for idiomatic use.”

Learning

Memory Aids

Mnemonic

Think: 'GLY' from 'glucose' (sweet taste) + 'COL' from 'alcohol' (its chemical family). A sweet alcohol.

Conceptual Metaphor

TYPICALLY NON-METAPHORICAL. Potential: 'Glycol is the lifeblood of the cooling system' (sustaining fluid).

Practice

Quiz

Fill in the gap
In cold climates, a 50/50 mix of water and is standard for engine coolant.
Multiple Choice

Which of these is a primary safety concern associated with common glycols like ethylene glycol?

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