Webster's English Dictionary

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integument

in.teg.u.ment \in-'teg-y*-m*nt\ \(.)in-.teg-y*-'ment-*l\ n [L integumentum, 
   fr. integere to cover, fr. in- + tegereX to cover - more at THATCH : 
   something that covers or encloses; esp : an enveloping layer (as  a skin 
   membrane or husk) of an organism or one of its parts - in.teg.u.men.tal aj