The Collaborative International Dictionary of English v.0.48:

Dill \Dill\ (d[i^]l), n. [AS dile; akin to D. dille, OHG. tilli,
   G. dill, dille, Sw. dill, Dan. dild.] (Bot.)
   An herb (Peucedanum graveolens), the seeds of which are
   moderately warming, pungent, and aromatic, and were formerly
   used as a soothing medicine for children; -- called also
   dillseed. --Dr. Prior.
   [1913 Webster]