Webster's Revised Unabridged Dictionary · 1913

Opodeldoc

Opodeldoc , noun

[So called by Paracelsus. The first syllable may be from Greek {not transcribed} vegetable juice.]

1.
A kind of plaster, said to have been invented by Mindererus, -- used for external injuries. [Obsolete]
2.
A saponaceous, camphorated liniment; a solution of soap in alcohol, with the addition of camphor and essential oils; soap liniment.