1. diesel-hydraulic - Noun
2. diesel-hydraulic - Adjective
a locomotive driven by a hydraulic transmission system powered by a diesel engine
Source: WordNetFollowing the impact of the privatisation of British Rail in the late 1990s, several other diesel-hydraulic DMU families have been introduced: * Class 168 Clubman and Class 170 171 Turbostar units, a development of the earlier Networkers. Source: Internet
Diesel-powered units may be further classified by their transmission type: diesel-electric (DEMU), diesel-mechanical (DMMU) or diesel-hydraulic (DHMU). Source: Internet
Of the three, electric transmission has proven the most popular, and although diesel-hydraulic locomotives have certain advantages and are continuously used in some European countries, most modern Diesel-powered locomotives are diesel-electric. Source: Internet
The earliest examples have now been withdrawn from service; * Sprinter a family of diesel-hydraulic DMUs. Source: Internet