Back in the age of innocence when the world was a simpler place, science was divided into a few well-defined divisions, such as chemistry, physics and biology. At first they subdivided into specialties (acoustics, optics, biochemistry) whose names were reasonably self-explanatory. But those days are gone forever. In cocktail party chitchat and in the importunate advertisements of companies trying to pirate talented scientists, laymen are now confronted by specialties whose names mean little or nothing in normal, educated English.
Some of the current crop that laymen are exposed to more and more and...