Share this entry

alginic acid Syllabification: al·gin·ic ac·id
Pronunciation: /alˌjinik ˈasid/

Definition of alginic acid in English:


An insoluble gelatinous carbohydrate found (chiefly as salts) in many brown seaweeds. The sodium salt is used as a thickener in foods and many other materials.
Example sentences
  • Food, cosmetic and pharmaceutical industries use three common types of hydrocolloid extensively when thickening or gelling properties are required: carrageenan and agar from red seaweeds and alginic acid from brown seaweeds.
  • Under similar conditions the polysaccharides with carboxyl groups, such as alginic acid and polygalacturonic acid, also photodecomposed.
  • Their main component, alginic acid, is converted into calcium salts (which are water-insoluble) and sodium salts (which are water-soluble).


Late 19th century: alginic from alga + -in1 + -ic.



Pronunciation: /ˈaljəˌnāt/
Example sentences
  • After the three flights, we measured the size of the pectoral muscle of the bird using a body mold in dental alginate, after which the bird was released.
  • Currently, they are developing a method to graft alginate, which is produced by brown seaweed, to cotton fibers.
  • Other gums used to a lesser extent might include guar, xanthan and alginate.

Definition of alginic acid in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day coiffeur
Pronunciation: kwäˈfər
a hairdresser