(archaic) Common soap composed of tallow, resin, and soda.

plural of soap pan

A large tank for boiling the ingredients in making soap.

Acacia concinna, also known as shikakai

present participle of soft-soap

simple past tense and past participle of soft-soap

A test for determining the hardness of water by shaking it up with liquid soap (not detergent).

plural of soap test

(US) washing-up liquid

A potassium-based soap for use with seawater.