The Collaborative International Dictionary of English v.0.48:

Spicknel \Spick"nel\, n. [Contr. from spike nail a large, long
   nail; -- so called in allusion to the shape of its capillary
   leaves.] (Bot.)
   An umbelliferous herb (Meum Athamanticum) having finely
   divided leaves, common in Europe; -- called also baldmoney,
   mew, and bearwort. [Written also spignel.]
   [1913 Webster]