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.
For example, the most extreme type of reform Darwinism was eugenics, a term coined by Sir Francis Galton in 1883 from the Greek word eÃ¼genÃ¡v, meaning well-born. Eugenists claimed that particular racial or social groupsâusually wealthy Anglo-Saxonsâwere naturally superior to other groups.