The Collaborative International Dictionary
dillseed
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.
Wiktionary
dillseed
n. The pungent seed of the dill plant used as a flavouring