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Etymology edit

From algin +‎ -ic and acid.

Pronunciation edit

  • IPA(key): /ælˌdʒɪn.ɪk ˈæs.ɪd/
  • (file)

Noun edit

alginic acid (plural alginic acids)

  1. (biochemistry) An insoluble colloidal acid (C6H8O6)n that in the form of its salts is a constituent of the cell walls of brown algae and is used as a food additive.
    • 1955, Rachel Carson, chapter 2, in The Edge of the Sea[1], Boston: Houghton Mifflin, page 17:
      For the long-stalked kelps that sway in dusky forests just below the level of the spring tides, survival in the surf zone is largely a matter of chemistry. Their tissues contain large amounts of alginic acid and its salts, which create a tensile strength and elasticity able to withstand the pulling and pounding of the waves.

Synonyms edit

  • (thickener, stabiliser, gelling agent, emulsifier): E400

Derived terms edit

Translations edit

References edit