backrim
nounUK /ˈbæk.rɪm/
US /ˈbæk.rɪm/
The back edge of something round, like a wheel or a cup.
The ball rolled and hit the backrim of the hoop.
OTHER MEANINGS
2. The rear part of a basketball hoop's rim.
His shot bounced off the backrim and went in.
3. The back edge of a skateboard or bicycle wheel.
The backrim of his skateboard was scratched.
4. The rear border of a cup or bowl.
She wiped the backrim of the mug before pouring tea.