gum tragacanth

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(ˈtræg əˌkænθ, ˈtrædʒ-)

a gum of various Asian shrubs belonging to the genus Astragalus, of the legume family, used as a filler, as in pills, and to stiffen calico.
[1565–75; < Latin tragacantha goat's thorn < Greek tragákantha=trág(os) goat + ákantha thorn]
References in periodicals archive ?
To this end, they used zinc nitrate hexahydrate and gum tragacanth obtained from the Northern parts of Khorassan Razavi Province as the zinc-providing source and the agent to control the size of particles in aqueous solution, respectively.
They were prepared by cutting the colocynth to a small size, and reducing it to a fine powder in a mortar, rubbed with oil of sweet almonds; adding gum tragacanth, and mastic afterwards.
When we were given the all-clear, our hair was glued down with Amami wave set, which I think was gum tragacanth dyed green.