More than two thousand alphabetically arranged entries cover topics in subjects ranging from cell metabolism and nutrition to organic and physical chemistry.

Defines more than 5,000 terms used in the field of environmental science.

Presents over 2,000 alphabetically arranged entries on various concepts and topics in ecology and environmental science.

Defines more than 2,400 terms and phrases related to computers, programming, data processing, and the Internet.

Incorporating the new terms and research compiled in the last few years in this field, The Facts On File Dictionary of Biology, Fourth Edition clearly defines t