contactline
nounUK /ˈkɒntæktlaɪn/
US /ˈkɑːntæktlaɪn/
A contact line is the edge where a liquid meets a surface.
The water's contact line moved slowly across the dry table.
OTHER MEANINGS
2. A line of people or things that touch each other in a row.
The children formed a contact line along the wall.
3. A phone or communication line used to reach someone.
Please call the contact line if you need help.
4. The line along which two objects or surfaces touch.
The contact line between the two gears was smooth.