Completely updated and revised, the fourth edition of The Facts On File Dictionary of Chemistry examines this popular science subject in clear, easy-to-follow prose. Approximately 280 new entries have been added to reflect new information, and current entries and back matter have been revised as needed. Pronunciation symbols are now included, and many line illustrations have been replaced. This dictionary is an invaluable reference source for anyone with an interest in chemistry.

New entries include:
Alpha helix
Chaotic reaction
Filtrate
Fruit sugar
Geochemistry
Keto form
Liquid crystal
Nanotechnology
Trans fat
X-rays.