eyeblack
/ˈaɪˌblæk/
noun
- A dark substance, such as charcoal or grease, applied under the eyes to reduce glare from the sun, often used by athletes.
- Many football players use eyeblack to cut down on glare from the stadium lights.
- She smeared eyeblack under her eyes before the outdoor soccer game.
- The baseball players wore eyeblack to help them see the ball in bright sunlight.