Since 1898, Dorland's Pocket Medical Dictionary has continuously maintained the standard as the world's most convenient, user-friendly, portable reference on medical terminology. Thoroughly revised to reflect the latest advances in medicine, this 28th edition delivers the accurate, clear, up-to-date definitions you expect from Dorland's - in a highly compact, easy-to-use format. The bonus software lets you add hundreds of thousands of medical terms to your computer's spell-checker.