lo ‧ tion /ˈləʊʃ ə n $ ˈloʊ-/ BrE AmE noun [uncountable and countable]
[ Date: 1300-1400 ; Language: Latin ; Origin: lotio 'act of washing' , from lavare 'to wash' ]
a liquid mixture that you put on your skin or hair to clean, ↑ soften , or protect it:
suntan lotion