IPA: /ˌɛmbrəˈkeɪʃən/
KK: /ˌɛmbrəˈkeɪʃən/
A type of lotion or liquid used to rub on the skin, often to relieve pain or soreness.
After the long ride, he applied an embrocation to soothe his sore muscles.
Embrocation is formed from "embrocare" (from Latin *imbrocāre*, meaning to moisten or wet) and the suffix "-tion" (meaning the action or process of). The word refers to the action of applying a liquid, often for therapeutic purposes, to the body.
Think of 'moistening' ('embrocare') something to help it feel better — that's why embrocation means applying a soothing liquid.