Dictionaries
- Biology DictionaryA large online dictionary of biology terms introducing and combining various basic aspects of the biological and earth sciences.
- Integrated Taxonomic Information SystemAuthoritative taxonomy of plants, animals, fungi, and microbes around the world by the US Department of Agriculture.
- A Molecular Biology Glossary Provides terms and definitions related to a number of diagrams.
- Avian External Anatomical Terms One-page summary of scientific terms describing avian anatomy.
- Biology Glossary By M. J. Farabee of Maricopa Community Colleges
- BioTech's Life Science Dictionary BioTech's Science Dictionary contains over 8300 terms associated with genetics, biochemistry, biotechnology, botany, chemistry, ecology, limnology, pharmacology, toxicology and medicine.
- Biotechnology Terms The online version of Technomic Publishing's Glossary of Biotechnology Terms by Kimball R. Nill. Search or browse.
- Bird Dictionary Bird On! indexed dictionary of birdwatching terminology.
- Bird Names (9 Languages) Translation of bird names in nine languages
- Birds of Britain Illustrated collection of terms and descriptions of birds found in British Isles.
- Birdwatcher's Dictionary
- Butterfly Glossary Cross-referenced glossary of butterfly species with pictures.
- Cat Fancier's Glossary Glossary, acronyms, list of titles and breed descriptions.
- Complete Guide North American Plants & Animals Audubon Guides to 4800+ plants and animals, ecards, newsletters, bird audio, 4000 color photographs, nature discussions.
- COPE Online Cytokines Dictionary Horst Ibelgaufts' COPE Cytokines Online Pathfinder Encyclopaedia
- Cortland Herpetology Collection One-page glossary of herpetology terms.
- Dictionary of Cell Biology An online Dictionary for cell and molecular biology
- Dictionary of Names of Animals: Mammals & Birds Pan-European Dictionary of Common Names of Wild and Domestic Animals: Mammals and Birds in 53 Languages of Europe.
- Fins' Aquarium Glossary Vocabulary relating to aquariums.
- Fish Species Catalog Searchable catalogue of nearly 54,000 individual fish species and their synonyms maintained by the California Academy of Sciences.
- Funet Taxonomy of Organisms A tree-structured dictionary of the generic names of all life forms.
- Gene Dictionary of the Mouse Genome
- Genetics Glossary Glossary of genetic terminology maintained by the Rockefeller University.
- Glossary of Avian Terms A glossary providing standard definitions for many of the terms used in avian conservation biology
- Glossary of Microbiology From the textbook Microbiology, 5 ed. by Prescott, Klein, and Harley
- Glossary of Terms from "The Origin of Species" Glossary of terms used in Darwin's "The Origin of Species".
- Gordon's Entomological Glossary An online glossary of entomological terms
- Hypermedia Glossary of Genetic Terms Provides a searchable listing together with related terms.
- Hypermedia Glossary of Genetic Terms Glossary of genetic terms with pictures and links. Search results also show the context sensitive meaning of the related terms.
- Lexicon of Parrots Searchable glossary of parrot species and terminology.
- Multilingual Dictionary of Bird Names Translation of bird names in nine languages
- Multilingual Equine Dictionary
- Names of Insects in Canada (French, English, Latin)
- Oceanlink On-line Glossary of Oceanography Substantial searchable glossary of oceanography.
- Pest Control Dictionary Large HTML dictionary of animal and plant pests.
- Scientific English-Danish Cetacean Dictionary By watching the whales you can prolong the life of cetaceans as a species.
- Sharks Glossary of types of sharks, related scientific terms with pictures for many entries.
- Spider Glossary List of terms used in the study and description of spiders and their activities.
- Talking Glossary of Genetic Terms Provided by the National Humane Genome Research Institute. Includes illustrations and detailed descriptions in audio.
- Vision Glossary Dictionary for terminology used in the study of human and animal vision.
- Whale Glossary Whale glossary explains basic terms about Cetaceans, A.
- What Animal Sounds Are Called List of words for animal sounds (e.g. cows moo, chickens cluck, etc.).
- Zoology Nomenclatural Terms Glossary of terminology commonly encountered within publications dealing with the systematics and nomenclature of animals.

