Webster’s Revised Unabridged Dictionary · 1913
Opodeldoc
Op′o·del′doc, n. [So called by Paracelsus. The first syllable may be fr. Gr. ὀπός vegetable juice.]
1. A kind of plaster, said to have been invented by Mindererus, — used for external injuries. [Obs.]
2. A saponaceous, camphorated liniment; a solution of soap in alcohol, with the addition of camphor and essential oils; soap liniment.