Freebase(0.00 / 0 votes)Rate this definition: Tongue. The tongue is a muscular hydrostat on the floors of the mouths of most vertebrates which manipulates food for mastication. It is the primary organ of taste, as much of the upper surface of the tongue is covered in papillae and taste buds.
1. eugenics-the study of methods of improving genetic qualities by selective breeding (especially as applied to human mating). bioscience, life science-any of the branches of natural science dealing with the structure and behavior of living organisms.
There seem to be two different schools of thought on allowing genetic research for the purposes of eugenics. The first is a form of laissez-faire eugenics, allowing âwhat will be to be.â[[#_edn9|[ix]]] However, as Kitcher points out, this leads to problems of justice, equality, and social pressure.