[G6Tanuki]

I've always called the individual conductive lines 'traces' because back in the days when we produced them by hand we did indeed trace the layout using tracing-paper [or 'Izal' toilet-paper if you were a poor student like me!] as part of the process.

I similarly refer to a collected set-of-PCB-traces as a "Mask" since it's used to mask-off the parts where you want the copper to remain during etching.

[Language evolves. I find it annoying when people talk of a newly-released "film" [the thing has almost certainly never been anywhere near celluloid-stock at any point in the production/distribution-process], or a "mixtape" when they mean a playlist.]