Related Clues:

• Ref. work with more than 300,000 entries
• Pub. with over 300,000 entries
• Exhaustive ref.
• Work started by London's Philological Soc.
• Its Vol. XVI is "Soot-Styx"
• Ref. work with online subscriptions
• Wk. that begins with "A-Bazouki"
• Definitive source for linguists: Abbr.
• Large British ref. book
• Multi-volume ref.
• The OED, e.g.
• One might be collegiate: Abbr.
• 20-volume ref. work
• Philologists' work, for short
• Word-lover's ref. book