Word Study
xanthoxylum
CIDE DICTIONARY
xanthoxylum, n. [NL., from Gr. xanqo`s yellow + xy`lon wood.].
A genus of prickly shrubs or small trees, the bark and rots of which are of a deep yellow color; prickly ash. [1913 Webster]
" The commonest species in the Northern United States is Xanthoxylum Americanum . See Prickly ash , under Prickly ." [1913 Webster]
For further exploring for "xanthoxylum" in Webster Dictionary Online