Encyclopedias

Medical Encyclopedia - Disease Reference
Medical Encyclopedia on diseases. Encyclopedic information includes an overview, symptoms, treatments, illustrations and connecting links with expanded information. This encyclopedia is available through MEDLINEplus from the National Library of Medicine, National Institute of Health.

Columbia Encyclopedia
Searchable encyclopedia with hypertext cross-references.

KEGG: Kyoto Encyclopedia of Genes and Genomes
Kyoto Encyclopedia of Genes and Genomes is an encyclopedic representation of current knowledge in molecular and cellular biology in terms of the information pathways that consist of interacting molecules or genes. This resource also provides links from the gene catalogs produced by genome sequencing projects.

Britannica Online
Britannica’s encyclopedia is searchable from this site.