The Collaborative International Dictionary of English v.0.48:

Solomon \Sol"o*mon\, n.
   One of the kings of Israel, noted for his superior wisdom and
   magnificent reign; hence, a very wise man. -- Sol`o*mon"ic,
   a.
   [1913 Webster]

   Solomon's seal (Bot.), a perennial liliaceous plant of the
      genus Polygonatum, having simple erect or curving stems
      rising from thick and knotted rootstocks, and with white
      or greenish nodding flowers. The commonest European
      species is Polygonatum multiflorum. Polygonatum
      biflorum and Polygonatum giganteum are common in the
      Eastern United States. See Illust. of Rootstock.

   False Solomon's seal (Bot.), any plant of the liliaceous
      genus Smilacina having small whitish flowers in terminal
      racemes or panicles.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Solomon's seal \Sol"o*mon's seal\
   A mystic symbol consisting of two interlaced triangles
   forming a star with six points, often with one triangle dark
   and one light, symbolic of the union of soul and body. It is
   shaped identically to the hexagram and Star of David,
   distinguished only in its usage.
   [Webster 1913 Suppl. +PJC]