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.
To understand why eugenics gained such a following in the first three decades of the 20th century, one needs to examine the economic, social, and political context in which it flourished. Science, or what is claimed to be science, is a product of culture like any other human activity.