Webster's Revised Unabridged Dictionary · 1913

Lotion

Lotion , noun

[Latin lotio, from lavare, lotum, to wash: compare French lotion. See Lave to wash.]

1.
A washing, especially of the skin for the purpose of rendering it fair.
2.
A liquid preparation for bathing the skin, or an injured or diseased part, either for a medicinal purpose, or for improving its appearance.