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.
As the eugenics movement in the United States declined during the 1930s, some of its most vociferous proponents were clergymen, such as Congregationalist minister Rev. 25) I also referred to most major books on the history of the American eugenics movement written in the past forty years.