University of Maryland Medical Reference Guide
This Reference Guide provides definitions for the most common medical terms.

Medterms Medical Dictionary
Easy-to-understand explanations of over 15,000 medical terms. This online medical dictionary provides quick access to hard-to-spell and often misspelled medical definitions through an extensive alphabetical listing.

Healthopedia
A medical and health consumer information resource containing comprehensive and unbiased information in patient-friendly language from trusted sources on over 1,500 health topics, 70 focussed health centers, and more than 11,000 drugs and medications.

BBC Health Page
Find out how your body works! Do a body tour and have a real close look. How you think about yourself matters - it can affect your school and home life.