alginate: meaning, definition, pronunciation and examples
C1/C2Technical / Scientific
Quick answer
What does “alginate” mean?
A salt or ester derived from alginic acid, a viscous polysaccharide extracted from brown seaweed.
Audio
Pronunciation
Definition
Meaning and Definition
A salt or ester derived from alginic acid, a viscous polysaccharide extracted from brown seaweed.
A gelling agent used in food, pharmaceuticals, and dental impressions, forming hydrogels in the presence of calcium ions.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or semantic differences. Spelling is identical. The dental product 'alginate impression material' is common in both varieties.
Connotations
Neutral technical term in both. May have a slight everyday association with food additives (E400-E405) in the UK/EU context.
Frequency
Equally low-frequency in general language but standard in relevant scientific, dental, and culinary technical fields in both regions.
Grammar
How to Use “alginate” in a Sentence
N of N (alginate of sodium)N + N (alginate dressing)be made from/with alginateVocabulary
Collocations
Examples
Examples of “alginate” in a Sentence
adjective
British English
- The alginate-based dressing is highly absorbent.
- We need an alginate-free formulation for this product.
American English
- The alginate-based impression material sets quickly.
- They offer an alginate-free version of the food thickener.
Usage
Meaning in Context
Business
Used in the food industry for product development and labelling (e.g., 'contains alginate').
Academic
Common in materials science, biomedical engineering, and marine biology papers discussing biopolymers.
Everyday
Rare. Possibly encountered on food ingredient lists or at the dentist.
Technical
Standard term in dentistry for impression materials, in wound care for dressings, and in food science as a thickener.
Vocabulary
Synonyms of “alginate”
Vocabulary
Antonyms of “alginate”
Watch out
Common Mistakes When Using “alginate”
- Mispronouncing as /ælˈɡaɪ.neɪt/ (hard 'g').
- Using as a verb (e.g., 'to alginate' is incorrect).
- Confusing with 'agar-agar', another seaweed-derived gelling agent.
FAQ
Frequently Asked Questions
Yes, it is a plant-based polysaccharide extracted from seaweed.
Both are gelling agents from seaweed, but alginate requires calcium ions to gel and comes from brown algae, while agar gels on cooling and comes from red algae.
Yes, certain alginates (e.g., sodium alginate) are approved food additives (E401-E405) used as thickeners, stabilisers, and gelling agents.
It forms a soft gel upon contact with wound exudate, maintaining a moist healing environment and being easily removed without damaging new tissue.
A salt or ester derived from alginic acid, a viscous polysaccharide extracted from brown seaweed.
Alginate is usually technical / scientific in register.
Alginate: in British English it is pronounced /ˈæl.dʒɪ.neɪt/, and in American English it is pronounced /ˈæl.dʒə.neɪt/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Think: ALGI from ALGAE (seaweed) + -ATE like in 'chemical compound'. So, a compound from algae.
Conceptual Metaphor
SUBSTANCE AS AGENT (The alginate captures the flavour; the dressing manages the wound exudate).
Practice
Quiz
Alginate is primarily derived from: