noun Nautical. 1.any of the small ropes or lines that traverse the shrouds horizontally and serve as steps for going aloft.
2.Also, ratline stuff. three-stranded, right-laid, tarred hemp stuff of from 6 to 24 threads, used for ratlines, lashings, etc.
Also, rat·lin.
Origin:
1475–85; earlier ratling, radelyng < ?