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.
Moron (psychology) Moron is a term once used in psychology to denote mild intellectual disability. The term was closely tied with the American eugenics movement. Once the term became popularized, it fell out of use by the psychological community, as it was used more commonly as an insult than as a psychological term. It is similar to imbecile and idiot.