vehicular

Etymology

From Late Latin vehiculāris.

adj

1. Of or pertaining to a vehicle or vehicles, usually specifically cars and trucks.
   Ernest had a fear of vehicular travel, and ended up walking everywhere.
2. Of or pertaining to a language that is used as a contact language between two groups who do not share a common native tongue nor a common culture.
   English is used as a vehicular language in many business settings.
   Latin was a vehicular language for natural philosophers and others from the late Renaissance to the late 18th century.