/ Dictionary / Index A algin fiber: Meaning and Definition of Find definitions for: al'gin fi"ber Pronunciation: [key] — Chem. Chem. an alkali-soluble fiber produced by injecting a fine stream of alkaline algin into an aqueous solution of a metallic salt, used chiefly in the manufacture of fine threads. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. alginate alginic acid Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language