The Collaborative International Dictionary of English v.0.48:

Thymy \Thym"y\ (t[imac]m"[y^]), a.
   Abounding with thyme; fragrant; as, a thymy vale. --Akenside.
   [1913 Webster]

         Where'er a thymy bank he found,
         He rolled upon the fragrant ground.      --Gay.
   [1913 Webster]