Source : Webster's Revised Unabridged Dictionary (1913)

Vaseline \Vas"e*line\, n. [Said by the manufacturer to be
   derived from G. wasser water + Gr. 'e`laion olive oil.]
   A yellowish translucent substance, almost odorless and
   tasteless, obtained as a residue in the purification of crude
   petroleum, and consisting essentially of a mixture of several
   of the higher members of the paraffin series. It is used as
   an unguent, and for various purposes in the arts. See the
   Note under {Petrolatum}. [Written also {vaselin}.]

Source : WordNet®

Vaseline
     n : a trademarked brand of petroleum jelly