the.com/biodiesel

means A diesel-engine fuel made from vegetable oils, animal fats, or used cooking grease instead of petroleum.

from A straightforward compound: 'bio-' (Greek bios, 'life') tacked onto 'diesel,' itself named after Rudolf Diesel, the German engineer who invented the compression-ignition engine in the 1890s. Diesel himself experimented with peanut oil as fuel, so the plant-based roots of the word are, fittingly, almost as old as the engine itself. 'Biodiesel' as a term took hold in the late 20th century as chemists figured out how to convert fats and oils into something an engine could actually burn without clogging up.