Silk.
Wilson
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T
D000818:Animals; D012831:Bombyx; D049690:History, Ancient; D049692:History, Early Modern 1451-1600; D049691:History, Medieval; D049711:History, Modern 1601-; D010678:Philately / Q000266:history*; D013523:Surgical Equipment / Q000266:history*; D013783:Textile Industry / Q000266:history*