This essential reference provides an invaluable tool for all students and professionals involved with the principles and practices of thermodynamics, primarily in the fields of engineering, physics, and chemistry. Drawing on 20 years of teaching experience, the author explains the key words and phrases in the discipline, deftly bringing out the essential ideas with only minimal use of mathematical notation. Distinguished by its easy-to-read writing style and interesting accounts of noted people and events in the history of the field, this dictionary provides easy access to an often confusing subject.