Meaning

noun a medication (in the form of an oil or salve etc.) that soothes inflamed or injured skin

adjective having a softening or soothing effect especially to the skin

originFrom Latin dēmulcēns, present active participle of dēmulceō (“to stroke caressingly; to soften, soothe, allure”), from dē- (“from; of”) + mulceō (“to move or touch gently or lightly, to stroke; to make pleasant or sweet; to soften, soothe, alleviate, relieve”).

Etymology from Wiktionary, CC BY-SA 3.0