DCHP-1 Online
oversnow 
adj. having to do with or intended for travelling over snow during winter.
- 1946 The plan [Exercise Muskox] called for a small force of a dozen tracked over-snow vehicles to make a 3200 mile trek. . . .
- 1949 It is a different story, however, with mobile detachments accompanying oversnow convoys.
- 1963 [The RNI10 is] used primarily for oversnow operations although it is capable of traversing rough ground, mud and muskeg with ease.
- 1946 The plan [Exercise Muskox] called for a small force of a dozen tracked over-snow vehicles to make a 3200 mile trek. . . .