Castile Soap Definition
noun
A fine, mild, hard soap prepared from olive oil and sodium hydroxide.
Webster's New World
Other Word Forms of Castile Soap
Noun
Singular:
Castile soap
Plural:
castile-soapsOrigin of Castile Soap
-
From Castile in Spain, from which it originally came.
From Wiktionary
After Castile
From American Heritage Dictionary of the English Language, 5th Edition
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