noun
suntan oil
A loanword from English, referring to oil applied to the skin to promote tanning.
海に行く前にサンタンオイルを塗った。
I applied suntan oil before going to the beach.
Variant with a middle dot; less common but still seen.
日焼け止め is sunscreen that blocks UV rays, while サンタンオイル promotes tanning.
Loanword from English 'suntan oil'.