Related Clues:
- Britannica, e.g.: Abbr
- British / lexicon, / in brief
- Brit. reference that recently added the word 'phablet'
- Multi-vol. reference
- Bottom-of-letter letters
- RSVP card, e.g
- Big U.K. lexicon
- Envelope insert (Abbr.)
- Noted ref. work
- Subj. of 'The Professor and the Madman'
- Ref. that includes ROFL as of 2016
- Its 1989 edition weighed about 138 lbs
- Ref. with quarterly online updates
- Online ref. since 2000
- Ref. which added 'starter marriage' and 'starchitect' in 2016