Dictionary.net

being made of fine olive oil, is generally used internally. The yellow and soft soaps are the most stimulating; and are, consequently, best adapted for particular cutaneous eruptions. Internally, soap is purgative and diuretic; externally, it is detergent and stimulant. Soapy water is used with the greatest success, in cases of poisoning by acids. It is mostly applied externally to bruises and sprains. In Pharmacy, it is used to favour the solution of resins.

S. made from olive oil.

n. A fine, hard, white, or mottled soap, made with olive oil and soda.