Venice soap en · NOUN
Meanings
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(historical, uncountable) A type of soap made from olive oil and soda.
After the gall stones have passed, which ought to be certainly known, Venice soap, and the Bath Waters, keeping the body open at the same time, are most likely to prevent the concretion of a new quarry.
1780, Philip Thicknesse, The Valetudinarian's Guide to Bath: