tramline
/ˈtɹæmlaɪn/noun
High School
1
The rails that a tram runs on.
2
Either of the two pairs of sidelines marked on a tennis court which mark the outside of the singles and doubles playing areas.
3
A scratch on a film, usually vertical, that extends through multiple frames.
4
A mark or bruise having the shape of two parallel lines.
5
A pair of vertical bars (||) placed to the left of the headword in certain editions of the OED to indicate that the term is "alien or not fully naturalized" (such as a recent borrowing).