In gem-cutting, same as roughing-mill and lead-mill.(noun)
The Century Dictionary (Public Domain)
Use "lead-lap" in a sentence
"Defending race champ Mark Martin is the track's all-time leader in lead-lap finishes with 27 in 43 Cup efforts."
"With Bayne's spot locked in for this year's Daytona 500, don't be surprised to see him contend for a top-10 finish -- after all, the Woods have the horsepower on plate tracks -- and strong underlying chassis and engine support by Roush and Ford could make his single-car effort a lead-lap finisher beyond that."
"Joey Logano, who led 122 of the 250 laps, and Keselowski were the only two lead-lap cars not to pit when the caution came out with 82 laps remaining."