hard soap


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Related to hard soap: soft soap

hard soap

a soap made with olive oil, or some other suitable oil or fat, and sodium hydroxide; used as a detergent, and in the form of a suppository or soapsuds enema for constipation; used also as an excipient in pills.
Synonym(s): Castile soap

hard soap

a detergent soap made with olive oil and sodium hydroxide.

hard soap

(hahrd sōp)
One made with olive oil, or some other suitable oil or fat, and sodium hydroxide; used as a detergent, and in the form of a suppository or soapsuds enema for constipation; used also as an excipient in pills.