blackboard eraser
Plural
blackboard erasers
1
a rectangular tool made of felt or foam used to remove chalk markings from a blackboard
- The teacher used the blackboard eraser to clean the chalkboard after the lesson.
- She wiped the equations off the blackboard with a swift motion of the blackboard eraser.
- The students took turns using the blackboard eraser to clear the board before the next class.
- He tapped the blackboard eraser against the chalk tray to remove excess dust.
- The old blackboard eraser left streaks on the board, so they replaced it with a new one.