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.
Eugenics and Immigration. 1  Committee on Immigration and Naturalization, United States Congress. The Eugenical Aspects of Deportation: Hearings before the Committee on Immigration and Naturalization House of Representatives, Seventieth Congress, First Session February 21, 1928...Statement of Dr. Harry H. Laughlin.