Pronunciation: (trag'u-kanth", traj'-), [key]
a gummy substance derived from various low, spiny, Asian shrubs belonging to the genus Astragalus, of the legume family, esp. A. gummifer: used to impart firmness to pills and lozenges, stiffen calicoes, etc. Also called gum tragacanth.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.