UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈtræɡəˌkænθ/US:USA pronunciation: respellingUSA pronunciation: respelling(tragə kanth′, traj-)

WordReference Random House Unabridged Dictionary of American English © 2020
trag•a•canth  (tragə kanth′, traj-),USA pronunciation n. 
  1. 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.
  • Greek tragákantha, equivalent. to trág(os) goat + ákantha thorn. Cf. tragedy, acantho-
  • Latin tragacantha goat's thorn
  • 1565–75

Collins Concise English Dictionary © HarperCollins Publishers::
tragacanth /ˈtræɡəˌkænθ/ n
  1. any of various spiny leguminous plants of the genus Astragalus, esp A. gummifer, of Asia, having clusters of white, yellow, or purple flowers, and yielding a substance that is made into a gum
  2. the gum obtained from any of these plants, used in the manufacture of pills and lozenges, etc
Etymology: 16th Century: from French tragacante, from Latin tragacantha goat's thorn, from Greek tragakantha, from tragos goat + akantha thorn
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