sunscreen
n. C / U A2 Elementary US //ˈsənskɹin// UK //sˈʌnskɹiːn// sun·screen
n. a cream or liquid you put on your skin to protect it from the sun. It helps prevent your skin from getting burned.
n. a topical substance, such as a lotion or spray, that absorbs or reflects some of the sun's ultraviolet radiation to protect the skin from sunburn.
You should apply sunscreen before going to the beach.
Even on cloudy days, dermatologists recommend wearing sunscreen to protect your face from long-term sun damage.
The effectiveness of any sunscreen depends heavily on its sun protection factor and whether the user reapplies the product after swimming or sweating.
From sun + screen.
Usage
Uncountable when referring to the substance in general; countable when referring to a specific brand or type.