Source with 600,000 words

• Venerable ref. set
• Ref. that uses British headword spellings
• Philologists' work, for short
• Brit. ref. work
• Webster's Third competitor, for short
• Library ref
• James Murray work: Abbr.
• Venerable reference book from the UK
• Its "Concise" version has more than 1,700 pgs

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
initialism (acronym) of Oxford English Dictionary , attested from 1898, according to the "Oxford English Dictionary."