noun: (UK, automotive, transport) Initialism of heavy goods vehicle. (a lorry/truck weighing more than 3.5 tons) [A lorry, truck or other large vehicle used to transport cargo with a total weight of at least 3.5 tonnes.]
noun: (aviation, aerospace, military) Initialism of hypersonic glide vehicle.
noun: (rare, pathology, virology) Abbreviation of Hepatitis G virus.
