to decay and become absorbed by the environment:
toys that will biodegrade when they’re discarded.
noun a biofuel intended for use in diesel engines Contemporary Examples Will Food Prices Jump After the Heat Wave? Matthew Zeitlin August 10, 2012 Volvo Tests Ultra-Efficient Plug-in Hybrid-Electric Diesel Bus Josh Dzieza May 16, 2013 Historical Examples Makers Cory Doctorow n. biodiesel (bī’ō-dē’zəl, -səl) See under biofuel.
noun a temperature-sensitive device stuck to the skin in order to monitor stress
the branch of biology dealing with energy or the activity of living organisms (opposed to biostatics). Contemporary Examples A Wine Revolution Sophie Menin May 22, 2011 noun (functioning as sing) the branch of biology that deals with the energy production and activities of organisms
the study of the interrelations among living organisms in their natural environment; ecology. noun another word for ecology (sense 1) noun Word Origin