Definition of "soapstock" [soapstock]

• A concentrated solution of salts of fatty acids obtained in the refining of edible oils (noun)

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• "The soap solution, known as soapstock, can be used for soap manufacture."
• ""soapstock" as mentioned in the preceding chapter, or decomposed by a mineral acid and made into "black grease" ready for distillation by superheated steam."
• "It’s certainly no less interesting than the inane lunacy of discussing “real” news stories, like the breaking WINA headline of the soy soapstock “sabotage” on Route 666 (the number of the beast!!)."