tracklaying
1 of 2noun
track·lay·ing ˈtrak-ˌlā-iŋ 
: the laying of tracks on a railway line
tracklaying
2 of 2adjective
: of, relating to, or being a vehicle that travels on two or more endless usually metal belts
Word History
First Known Use
Noun
1852, in the meaning defined above
Adjective
1884, in the meaning defined above