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.
Definitions of hemisphere. n. - A half sphere; one half of a sphere or globe, when divided by a plane passing through its center. n. - Half of the terrestrial globe, or a projection of the same in a map or picture. n. - The people who inhabit a hemisphere.