Free Visual Dictionary of Medical Terms by Merriam-Webster

The new Merriam-Webster's Visual Dictionary incorporates 6,000 color illustrations organized by subject area. The full-color pictorial images are grouped into chapters outlining major themes such as:

Earth
Plants & gardening
Animal kingdom
Human being
Food & kitchen
House
Clothing & articles
Arts & architecture
Communications
Transport & machinery
Energy
Science
Society
Sports & games

The free online access is heavily supported by ads but the medical section may still be useful to patients and students. The links include audio files with pronunciation.

References:
A Dictionary With a Point of View: Announcing Merriam-Webster's Visual Dictionary, Merriam-Webster, 2006.
Netter's Illustrated Human Pathology: A Searchable Collection of Images.
Image source: Merriam-Webster's Visual Dictionary

Updated: 01/22/2008