emulsion
C1Technical/Specialized
Definition
Meaning
A mixture of two liquids that do not normally combine easily, like oil and water, where one liquid is dispersed as small droplets throughout the other.
In photography, a light-sensitive coating on photographic film or paper, typically made of silver halide crystals suspended in gelatin.
Linguistics
Semantic Notes
The term implies a suspension or dispersion, not a true chemical solution. It often requires an emulsifier to maintain stability.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or meaning differences. The chemical/photographic usage is identical. Minor regional vocabulary may occur in collocations (e.g., 'emulsion paint' is common in UK domestic contexts).
Connotations
In UK domestic contexts, 'emulsion' often immediately connotes water-based wall paint. In US contexts, the photographic or culinary connotation may be slightly more primary.
Frequency
More frequent in UK everyday speech due to the common domestic term 'emulsion paint'. In the US, 'latex paint' or simply 'paint' is more common, making 'emulsion' more specialised.
Vocabulary
Collocations
Grammar
Valency Patterns
[emulsion] + [of + liquid1 + and + liquid2][verb: form/create/break] + [an/the emulsion][adjective: stable/unstable] + [emulsion]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[No common idioms for 'emulsion']”
Usage
Context Usage
Business
Rare, except in specific industries like paints, coatings, food, or cosmetics manufacturing.
Academic
Common in chemistry, physics, materials science, and photographic history texts.
Everyday
Most common in UK: discussing home decoration ('emulsion paint'). Also in cooking (e.g., mayonnaise, vinaigrette).
Technical
Precise term in chemistry, photography, food science, and pharmacology for a specific type of colloidal system.
Examples
By Part of Speech
verb
British English
- The chef will emulsify the oil and vinegar to make the dressing.
- The mixture failed to emulsify properly.
American English
- You need to emulsify the ingredients slowly for the mayonnaise to hold.
- The machine emulsifies the fluids into a smooth lotion.
adverb
British English
- [No standard adverbial form for 'emulsion'. The related verb 'emulsify' is not typically used as an adverb.]
American English
- [No standard adverbial form for 'emulsion'. The related verb 'emulsify' is not typically used as an adverb.]
adjective
British English
- We need an emulsifying agent like lecithin.
- The emulsified paint dried with a matte finish.
American English
- The formula contains an emulsifying wax.
- An emulsified fuel burns more efficiently.
Examples
By CEFR Level
- Mayonnaise is an emulsion of oil and egg.
- We need to buy white emulsion for the bedroom walls.
- Shake the bottle well to form an emulsion.
- A stable emulsion requires an emulsifier to prevent the liquids from separating.
- The photographic emulsion on old film can degrade over time.
- The chemists developed a novel oil-in-water emulsion for the topical drug delivery system.
- The instability of the emulsion led to phase separation during storage.
Learning
Memory Aids
Mnemonic
Think of MAYONNAISE: it's a classic edible EMULSION of oil and egg yolk. E-MUL-SION sounds like 'I mix liquids on'.
Conceptual Metaphor
FORCE/STABILITY OVER NATURAL SEPARATION (An emulsion is a forced, temporary unity of things that want to be apart).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation to 'эмульсия' when referring to common paint; specify 'водоэмульсионная краска'. In cooking contexts, 'соус-эмульсия' is accurate for dressings.
Common Mistakes
- Using 'emulsion' to describe any mixture (it must be liquids). Pronouncing it as /ɪˈmʌl.zi.ən/. Confusing it with 'solution' (where substances dissolve).
Practice
Quiz
In which field would you *most specifically* encounter the term 'emulsion' referring to a light-sensitive coating?
FAQ
Frequently Asked Questions
No. An emulsion is a specific type of mixture where two immiscible liquids (like oil and water) are combined, with one dispersed as tiny droplets in the other. Not all mixtures are emulsions.
It is a water-based paint where pigment particles are suspended in a water-borne polymer emulsion. It's popular for interior walls because it's quick-drying, low-odour, and easy to clean up.
In a solution (like salt in water), the components dissolve at a molecular level and form a homogeneous mixture. In an emulsion, the components remain as distinct droplets suspended in another liquid, forming a heterogeneous mixture.
The direct verb is rarely used ('to emulsion'). The standard verb is 'to emulsify', meaning to make into or mix as an emulsion.