The Collaborative International Dictionary of English v.0.48:

Snakewood \Snake"wood`\, n. (Bot.)
   (a) An East Indian climbing plant (Strychnos colubrina)
       having a bitter taste, and supposed to be a remedy for
       the bite of the hooded serpent.
   (b) An East Indian climbing shrub (Ophioxylon serpentinum)
       which has the roots and stems twisted so as to resemble
       serpents.
   (c) Same as Trumpetwood.
   (d) A tropical American shrub (Plumieria rubra) which has
       very fragrant red blossoms.
   (e) Same as Letterwood.
       [1913 Webster]