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.
Cloning. 1  We live in a brave new world in which reproductive technologies are ravaging as well as replenishing families. 2  This new eugenics is simply the latest version of the age-old quest to make human beings--in fact, humanity as a whole--the way we want them to be: perfect.