Source : Webster's Revised Unabridged Dictionary (1913)

Levesel \Lev"e*sel\ (l[e^]v"[-e]*s[e^]l), n. [AS. le['a]f a leaf
   + s[ae]l, sel, a room, a hall.]
   A leafy shelter; a place covered with foliage. [Obs.]

         Behind the mill, under a levesel.        --Chaucer.