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Webster 1913 Edition

Noun.

[So called by Paracelsus. The first syllable may be fr. Gr. [GREEK] vegetable juice.]

A kind of plaster, said to have been invented by

Mindererus

, – used for external injuries.

[Obs.]

A saponaceous, camphorated liniment; a solution of soap in alcohol, with the addition of camphor and essential oils; soap liniment.

, n.

The name of a plaster, said to have been invented by Mindererus; but in modern usage.

A saponaceous camphorated liniment; a solution of soap in ardent spirits, with the addition of camphor and essential oils.

opodeldoc ‎(plural opodeldocs)

(obsolete) A kind of plaster, said to have been invented by Mindererus, used for external injuries.
(obsolete) A saponaceous, camphorated liniment; a solution of soap in alcohol, with the addition of camphor and essential oils.

1857, Thomas Hughes, Tom Brown's School Days, part I, chapter 6.
[<span title=""Well, mind and get all right for next Saturday";">…] and the leader passed on, leaving East better for those few words than all the opodeldoc in England would have made him […]