Online Etymology Dictionary
etymonline.comHistories of English words and their earlier forms
Histories of English words and their earlier forms
Taxonomic lookup for living reptile species
Treaty records and depositary information
Visual-art history through artists, movements and ideas
Manuscript images and metadata for medieval-music study
Research explanations paired with charts and data explorers
Reports and data on human-development measures
Population statistics organized through maps and tables
Educational summaries on anesthesia and perioperative subjects
Radiology explanations organized around imaging topics
A collection of dictionaries, companions and encyclopedias
Dermatology reference with topic and image browsing
Yeast genomic information and related research resources
Swedish everyday and celebration cooking with practical kitchen reference guides
Dictionary, thesaurus and grammar reference in one service
A collaboratively written mathematics encyclopedia
A global bird classification with English naming guidelines
Australian scientific history connected to archival sources
Detailed card search and reference for Magic players
Ancient-history articles with illustrations and topic browsing
Norwegian encyclopedia entries across a broad subject range
Mineral and gemstone descriptions for reference study
Academic reference guidance on using sources in papers
Enterprise IT reporting and technical reference coverage